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What does a disk error occurred mean? Huawei Mate X pricing. UEFI or BIOS malfunction

A couple of days ago at work, I encountered the following problem: my computer generated an error and the Windows 10 system refused to boot. It all started when, while working, the system suggested restarting the computer to install the update. I agreed to the reboot. The update took a while, then the computer rebooted again. And then I discovered that the system would no longer start: the following message appeared on the black screen: .
I pressed the Ctrl+Alt+Del key combination on the keyboard, but it didn’t help: the error appeared again.

Having seen this error, I identified two main ones for myself: possible reasons its occurrence: either a hardware problem with hard drive, or damage to the MBR (master boot record containing the necessary data to boot the operating system).

First of all, I went to BIOS computer and checked: Is my hard drive visible there at all?. Oddly enough, the hard drive in the BIOS was displayed:

Then I started looking bootable USB flash drive, so that you can use it to try to restore the system.

At this time, my colleague passed by and, seeing this error on my monitor screen, immediately said: “ Check the RAM or SATA connection of the hard drive " I began to doubt that everything was so simple, but a colleague said that he had encountered this error more than once and most often the problem turned out to be in the hardware. Well, I decided to believe him and did as he suggested. In the end it really helped!!

First of all, I turned off the computer. Then he unscrewed the lid system unit. First I pulled it out of the slot on motherboard module RAM and moved it to another free slot. After that, I turned on the computer again - the error “A disk read error occurred Press Ctrl+Alt+Del to restart” did not disappear.

Then I turned off the computer again. Then I pulled out the cable from the hard drive from one SATA connector and plugged it into another free SATA connector on the motherboard. After that I turned on the computer again - THE ERROR IS GONE and the usual Windows loading began!

Now, for anyone who encounters this error when turning on their computer: I recommend not to panic, but to first follow the steps described in this article (if you do not have a laptop):

1. Move the RAM stick on the motherboard to another slot. Or just pull it out and put it back in.
2. Check the functionality of the SATA cable of the hard drive. If you have a spare one, just replace it.
3. Plug the cable from the hard drive into another free SATA connector on the motherboard.

If the above steps did not help, then you can move on to other ways to solve the problem: checking the hidden System Reserved partition (active or not), restoring the MBR bootloader, restoring integrity file system(utility Сhkdsk), reinstalling the system (as a last resort).

If the appearance blue screen death can be seriously alarming, what can we say about those cases when, when you turn on the computer, a black screen appears with one or several lines on English. Today we will try to deal with one of the most dangerous and common mistakes disk read error occurred press ctrl+alt+del to restart. It translates as “I can’t read the disk, press ctrl+alt+del and restart the computer.”

The reasons for disk read error occurred can be different, but one way or another they are associated either with damage to the magnetic surface of the disk itself, or with a cable or other hardware components, which is much less common. Below you can familiarize yourself with the main methods for treating the error, but first, let's find out what could be its primary cause.

  • Incorrect installation second operating system
  • Installing the old one Windows versions on top of the new one
  • Manipulations with logical partitions in the presence of unstable sectors
  • Falling of a working laptop (damage to mechanics)
  • Restoring the system from an image to a clogged partition
  • Turning off a running computer using the power button
  • Erroneous deletion of boot record by antivirus
  • Virus damage to boot record
  • Physical wear of the disk and the presence of many bad sectors on it
  • Problems with contacts, cables, controllers
  • Power supply malfunctions

So, if you encounter a disk read error occurred error, first of all make sure there are no hardware problems. Go into the BIOS and see if the drive is detected at all. If not, check the contacts. To be sure, you can try connecting the drive to your work computer. If the disk is not detected by the BIOS or is detected incorrectly, the data on it has turned into a “mush” - take the computer to service center, in this case it is better to trust the specialists.

Often the appearance of the disk read error occurred error is associated with partial or complete destruction of the MBR - the boot record located in the zero sector of the disk and providing identification of logical partitions. If the MBR information is correct, control is transferred to the “Reserved by the system” partition and further along the chain to the system partition C. If a discrepancy is detected, the error disk read error occurred or Reboot and select proper boot device is displayed. However, there are known cases when the disk read error occurred error appeared when the boot files hidden section “Reserved by the system”.

Checking a hidden partition

Boot from Acronis Disk Director or a similar program and first make sure that the “System Reserved” partition is marked as active (checked). If there is no such mark, right-click on the section and select the “Mark as active” option.

At the same time, make sure that the bootmgr file and the Boot folder necessary to boot the system are in place. If one of these elements is missing, this is most likely the cause of the error.

Recovering files from a hidden partition

To restore the boot files of a hidden partition, you will need a boot image with Windows 8.1. Boot from it, click “System Restore”, “Diagnostics”, “ Additional options", "Command line".

To determine the drive letters, run the notepad.exe command. In the Notepad that opens, select “File”, “Open”, “This PC” and look at the letters of the sections. In our example hidden section has the letter C, the Windows partition the letter D, and the boot drive the letter X.

Let's restore the download files by running the command bcdboot D:/Windows. If the error was due to corrupted download files, the problem will be resolved.

Checking the file system and repairing the boot record

The disk read error occurred error can be caused by file system corruption. To analyze and correct disk errors in command line boot environment run the commands chkdsk C: /r And chkdsk C: /f, and then repeat the same for the main partition with the system (partition D).

If the check does not reveal any problems, we try to restore the boot record. To do this, run these commands on the command line:

bootrec.exe /fixmbr
bootrec.exe /fixboot

After this, we search for operating systems and add them to the boot menu list:

bootrec.exe /rebuildBcd

Note

To recover MBR entries you can use third party programs, for example, the Paragon Partition Manager boot image. The same programs can be used to check and eliminate errors on the hard drive if the chkdsk analysis does not produce results.

Other options

If the methods described above did not help, you can try to reinstall the system by first deleting both the main system and reserved partitions. Better yet, remove the disk, connect it to another computer and, after copying all the valuable information, completely format it, and at the same time check for errors. After this, the system is installed on a blank disk.

Alternatively, you can try the following method. Unallocated space is separated from the user partition by Acronis or another similar program and installed into it copy of Windows. After this, two systems should appear in the boot menu, one of which, and maybe even both, will be completely working.

Have a great day!

We have all encountered various errors and they were all different, whether it was the screen of death, or some other critical problem, but I am sure that many have encountered such a problem when, when loading Windows, a black screen appears, and at the top left is written some English words. Today we will talk about such an error as “A disk read error occurred Press Ctrl+Alt+Del to restart”. If translated into Russian, it will roughly look like this: The disk is not readable, press Ctrl+Alt+Del and reboot.

The reasons for this error may be different, but even an inexperienced user will understand that the problem is related to the disk. It may be damaged physically, or there may be software reasons. Below I will list several common causes of disk read error occerred.

  1. The operating system is not installed correctly.

I want to say right away that after reinstalling the system, this problem was immediately solved for me. Let's move on.

  1. Possibly more than old version OS on top of the new one.
  2. Disk damage, for example when a laptop falls.
  3. happened using the power button
  4. Experiment with logical partitions
  5. occurred on a section that was almost completely clogged.
  6. The boot record is corrupted by a virus.
  7. The boot record was mistakenly deleted by the antivirus.
  8. The disc is quite old and worn out.
  9. Problem with contacts, controllers or cable.
  10. The power supply is faulty.

Now let's start solving the problem. First, make sure that the drive does not have hardware problems. Go into the BIOS and make sure the drive is detected. If the disk is missing, then check the contacts, cable, etc. on the disk, connect it to another computer, if it does not work there either, you should take the disk to a service center.

Most often, the appearance of this error is associated with the destruction of the MBR record (partial or complete), which is located on the zero sector and ensures the definition of logical partitions. By the way, there have been cases where this error appears when the files of a hidden partition called " Reserved by the system».

Checking the hidden section

To begin with, you should boot from the Acronis Disk Derector utility or a similar program and make sure that the “System Reserved” section is active at all. If this is not the case, then right-click on this disk and click “mark as active”.

You also need to check files such as bootmgr and folder Boot, which are intended to boot the system. If they are missing, then this is most likely the cause of the error.

Recovering a hidden partition

In order to restore missing files, you need to boot from a Windows 8 or 8.1 disk (flash drive). After the installation window appears, click below on the left " System Restore", Then " Diagnostics», « Additional options" And " Command line».

If you don't know what letter each section is labeled with, run notepad.exe at the command prompt. Once Notepad opens, click " File", Then " Open», « My computer" Let's see how the disks are marked.

Now let's move on to recovery, namely, enter the following command into the command line

Now, the same thing needs to be done for the other partition where you store your files. If there are several of them, then we do it for everyone.

It may happen that disk analysis does not reveal problems, then we will try to restore the boot record. This must be done using the following commands:

Other options

As I said above, the effective solution to this problem for me was a simple one. Before reinstalling, it will be best if you uninstall both the system and " system reserved» partitions, and then format the entire disk. Then, you can check for errors, and then install Windows on a blank disk, of course, re-partitioning it. 2 partitions will be quite enough, one system, and the other for your needs.

And one more thing. You can connect the drive to another computer and transfer all your important data to another. That's all, write down in the comments if you were able to solve the problem using these methods.


The problem a disk read error occurred press can seriously frighten any PC user. The problem is this: during Windows startup, the system tries to read the files necessary for this action, located in a hidden partition. Such data is extremely important, therefore, if it is missing or malfunctions, we will encounter such an error. We will consider further which options for the current situation can be corrected and which cannot.

Possible sources of malfunction

First, you should determine the sources of the problem when it says a disk read error occurred. There are quite a few of them, but some are easy to diagnose, so let’s get started:

  • The virus has damaged the system's boot sector;
  • The antivirus messed up something and erased the necessary entries;
  • The error appeared after incorrect installation Windows or installing one OS on top of another;
  • Have you partitioned the HDD into logical drives. In general, this is not a problem, but if there is bad sectors, some kind of failure may occur;

  • Perhaps you dropped the system unit/laptop or the hard drive itself;
  • The cables have come loose or broken; there are only two of them and therefore easy to check;
  • The likely cause is a worn-out power supply; if there is not enough voltage, the drive will not be able to operate correctly;
  • Sometimes controllers on the motherboard break down;
  • Restoring or rolling back the system, in cases of insufficient space on the media. Thus, some files are interrupted, while others remain the same, creating problems.
  • Hard drive failure or presence of a large number of unstable sectors.

Most situations with a disk read error occurred can be corrected, mainly those associated with software failures or connection loops.

To start fighting the disease, you need a Windows installation disk, otherwise nothing will work. Also, you need to be prepared that a complete reinstallation of the OS may be required.

Determining the health of the hard drive

A simple diagnostic measure to combat situations where the error a disk read error occurred leaves no way to access Windows is to view its display in the BIOS. If it displays the HDD correctly, then there is a high probability that the reason is still in the software, but if it is not detected or is displayed incorrectly, then the hard drive is not fixed. You can try to restore its functionality through a service center, but this is only relevant for copying important information from him. So, you need:

  • When the system starts, press Del;
  • Now use the arrows to navigate to the “Advanced BIOS features” section;

  • Then click on "Hard" Disk Boot Priority" or "Boot Device Priority".

Check that the hard drive name is displayed correctly, and then you can proceed further (if successful).

Error a disk read error occurred, how to fix it using Acronis Disk Director

To perform testing and troubleshooting through this program, you must have an Acronis boot disk; Paragon or others will also work. Now you should look at the following sections:

  • Launch through your application, this is done by pressing F9 or F8, when a window appears with the option to go to the BIOS;
  • Check that the “System Reserved” section is active. If this is not the case, then right-click and select “Mark as active”;

  • Also check the presence of the Boot folder and the bootmgr file on the disk; they are initially hidden, since they are system ones. First, turn them on.

If a folder or file is missing, you will have to restore it, as shown in the next section.

Restoring the boot partition

To solve the problem of a disk read error occurred Windows 7, you need an appropriate installation disk with the OS, the same for other versions. The procedure should help the system analyze the HDD for errors and, if they exist, try to fix them.

1.Now insert the disk or flash drive and run it;

4.Now “Advanced options”;

5.Then select “Command Line”;

6.First we need to launch Notepad, thanks to which we can find out the distribution of letters for logical drives. To do this:

  • Type notepad.exe and press enter;
  • Click on the “File” tab and select the “Open” option;
  • In “My Computer,” it is important to remember or write down the letters for the “System Reserved” partitions that contain Windows files and the boot sector.

7.For recovery Windows files you need to enter the command bcdboot C:/Windows, where C is the letter of the corresponding partition;

8.To check the reserved area, enter one by one chkdsk D: /r and chkdsk D: /f, where D is the letter of your partition and it may differ.

9.Then follow step 8 for the partition that contains Windows.

10.If the check was successful, you should restore the MBR entries using the following commands bootrec.exe /fixmbr and bootrec.exe /fixboot;

11.At the end, you need to search for the OS and include them in the boot list using bootrec.exe /rebuildBcd.

It is likely that after the steps shown, the error will disappear, but Windows will still not want to start (not often, but it happens). Then, after correcting the error a disk read error occurred, what to do is obvious, just reinstall the system again. It is better to first transfer all the files to another drive and format the original HDD and then install a clean Windows.

If you still have questions on the topic “How to fix the error a disk read error occurred?”, you can ask them in the comments


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Or in translation A disk read error occurred, press ctrl+alt+del to reboot! It’s quite possible, friends, you are now sitting in front of the monitor, watching this joyful message in the upper left part of the monitor and thinking about what it could mean, you are also going through options for solving the problem in your mind, but you don’t know which one to use first:

I won’t bore you and I want to say that the reasons for this error may be different, first of all, a damaged master boot record is to blame hard drive(MBR)! I also encountered the same problem on new hard drives with a GUID partition table (GPT).

A damaged Windows bootloader may also be to blame, and in this case, by all logic, the error BOOTMGR is missing press CTR-Alt-Del for restart or NTLDR is missing should appear, but A disk read error occurred press ctrl+alt+del to restart may also appear .

Friends, if everything written below throws you into shock and you are already preparing to say goodbye to your operating system and programs installed more than one day, then it’s in vain! There is a much simpler way than all this dancing with a tambourine around the command line, this method Listed last, suitable for all operating systems, get to it!

And disk read error occurred press ctrl+alt+del to restart

Computers with this error are often brought to me at work, and like any person periodically faced with the same problem, I have developed a unique algorithm of behavior.

First of all, I ask the person about what he was doing at the computer before the error appeared and enter the information into a special text file. Then, if I don’t remember the solution from memory, I look in the same file for information on whether there was such a problem before and how I solved it. Over time this file It grew and my colleagues even began to look into it, and one of them once said: “You should put all this on the Internet, many would find it useful, what the hell!”

It was somehow embarrassing to post a simple text file on the Internet, and that’s how our website came to be!

So, friends, my memory and the history of this file said that basically the error A disk read error occurred appeared for users after the following actions:

  1. IN lately, before loading the operating system, the hard drive was often checked for errors, and during the next such check, I simply disconnected the computer from the network and turned it on again, I thought that Windows would start without this long check, as a result, an error appeared on the black screen And disk read error occurred press ctrl+alt+del to restart. How can I get Windows back to work, there are a lot of programs I need there?
  2. Checked operating system virus scanner Kaspersky Virus Removal Tool and a warning came out that the boot sector of the hard drive was infected, after cleaning the system from viruses, the computer began to boot with the same error.
  3. I dropped a working laptop on the floor and a familiar error appeared.
  4. Checked hard drive on bad blocks with the HDDScan program and accidentally started checking the hard drive with the Erase test in linear recording mode (sector-by-sector erasure of data). I came to my senses literally after a couple of seconds and stopped the test, but the next time the computer booted with the error A disk read error occurred. I booted from the LiveCD, all the operating system files were intact, but for some reason Windows did not load. They say on the Internet that I managed to erase the hard drive boot record (MBR). How can I restore it?
  5. I installed a second operating system on the computer, after installation, naturally only the second one loaded, I installed the EasyBCD 2.0.2 bootloader as a boot manager, but apparently I configured something wrong there and not a single Windows boot, I am stuck with an error when loading A disk read ... and something else there. What to do?
  6. When separating space from the D: drive and attaching it to the C: drive, the computer rebooted and a familiar error appeared.

Friends, any computer scientist will tell you that in all of the above cases, for the most part, the hard disk boot record (MBR) suffered from user actions, and only in the fifth case did the user’s files suffer Windows boot 8. I have listed the reasons for the error, let’s move on.

It is important to know: Any operating system boots the same way - the BIOS reads the first sector (be it a CD, flash drive or hard drive) from the specified boot priority device (be it a CD, flash drive or hard drive), this first sector is the MBR (Master Boot Record). The MBR is always located in the first sector of the boot device and occupies 512 bytes. If this sector contains incorrect information, the computer displays the error A disk read error occurred or another Reboot and select proper boot device or insert boot media.

The correct MBR has a code (signature) in the last two bytes - 55AA.

The presence of the code checks the BIOS and if it is not there, the disk is not bootable and we get our error.

MBR in the diagnostic program hard drives Victoria

Important to know: If the information in the MBR is correct, then the baton is passed on to the hidden System Reserved partition.

We all know that in the Windows 7 and Windows 8 operating systems, booting occurs from a hidden System Reserved partition, which has a capacity of 100 MB (Windows 7) and 350 MB (Windows 8).

The main purpose of the hidden partition is to store Windows 7 or Windows 8 download files.

The hidden partition is always “Main” and has the “Active” attribute, which hints to the BIOS that this partition contains the operating system boot files. If we assign a letter to the hidden partition, we will see the boot manager file bootmgr and the Boot folder, which contains the boot storage configuration files (BCD). These files are hidden and to display them in the system you need to enable the display of hidden protected system files.

The bootmgr file and boot store configuration files (BCD) are responsible for loading the operating system and if they are damaged Windows 7 or Windows 8 will not boot with errors such as "BOOTMGR is missing. Press ctrl+alt+del" or "NTLDR is missing Press ctrl+ alt+del" or A disk read error occurred press ctrl+alt+del to restart!

How to get rid of the error?

It doesn’t matter whether you have Windows 7 or Windows 8 installed, we do everything the same.

First reason. The hidden System Reserved partition, volume 100 or 350 MB, is no longer active.

If you have a boot disk Acronis programs Disk Director, boot your computer from it and look at the following information in the program window.

The hidden System Reserved partition, with a volume of 100 or 350 MB, must be active, marked with a red flag. The screenshot shows that it is inactive, which may well be the reason for our error during loading.

Make the Hidden System Reserved partition active, right-click on it and select Mark as active.

Click Apply expected operations.

The volume "Reserved by the system" will be marked as active.

We reboot and the error is gone.

What to do if you don't have boot disk Acronis Disk Director? The answer is, all this can be done on the command line.

Boot from the recovery disk or installation disk Windows 8.

Press any key and confirm your intention to boot from the disk.

System Restore

Diagnostics

Additional options

You can try Automatic recovery systems (in my opinion a useless thing). We tried it and came back here again! Select a parameter Command line

Note: Friends, now we will work with the command line of the environment Windows recovery 8. I will give you the necessary commands, but if it is difficult for you to remember them, you can create a cheat sheet - a text file with a list of necessary resuscitation commands and open it directly in the recovery environment. This will make your work much easier.

The system has one hard drive.

Make active the hidden System Reserved partition, volume 350 MB.

DISKPART

list disk- displays all hard drives in the system

sel disk 0- select the only hard drive 0

list partition- displays all available partitions on the hard drive

sel part 1- select partition 1 - System Reserved, volume 350 MB

active and the section becomes active.

If this does not help, or the System Reserved partition, the volume of 100 or 350 MB is already active, then we’ll try something else.

Recovering the hard disk boot record (MBR)

Once I had an interesting case with this error on Win 8. No matter what I did, it came out again and again, but this is what helped.

Boot from a recovery disk or installation disk Windows disk 8. And we do everything the same as in the previous case. Loading into the Action Selection menu

Enter Bootrec and press Enter.

We see information about the utility's capabilities: Restoring critical disk structures. /FixMbr - Writes the master boot record (MBR) of the Windows-compatible system partition.

Enter the commands:

Bootrec/FixMbr- a master boot record (MBR) compatible with Windows 7 or Windows 8 is written.

Bootrec/FixBoot- the utility writes a new boot sector.

Bootrec.exe /ScanOs - The utility searches all hard drives of the operating systems Windows XP, Windows 7, Windows 8. Two found.

Bootrec.exe /RebuildBcd- scans the hard drive for the presence installed Windows and if any are found, it will offer to add them to the boot menu. We agree and enter Y. If a second system is needed, enter Y again. Everything is visible on the screenshot.

But in my case this did not happen and an error occurred again when loading. Then I booted from the Microsoft Diagnostics and Recovery Toolset (MSDaRT) rescue disk (you can use a simple LiveCD)

and looked at the contents of the System Reserved section, a volume of 350 MB containing the main components necessary to boot Winows 8, such components are the file bootmgr and at the same time the BCD download storage configuration files (located in the folder Boot). So, there was a Boot folder, but there was no bootmgr loader, so Windows did not boot.

I simply copied the boot loader from the Windows 8 installation disk to the System Reserved partition. It's done like this.

Booting from Windows 8 installation disk and again we make our way to the command line of the Windows 8 recovery environment

We type in the command line

diskpart

list volume

We see that the drive is assigned a letter G:, hidden partition System Reserved, volume 350 MB, Windows 8 recovery environment assigned a letter C:(operating system files, the Windows folder is on the disk E:).

Enter exit and exit diskpart.

On the command line we enter G:, with this command we enter the Windows 8 installation disk.

Enter the command

copy bootmgr C:\ that is, we copy the bootmgr loader from the Windows 8 installation disk to the hidden System Reserved partition C:. That's it.

After such manipulations, the error A disk read error occurred disappeared and Win 8 booted.

If you again fail to download, then the issue may be different.

We restore the Windows bootmgr file and at the same time the boot storage configuration files (BCD)

This means the problem is in incorrect Windows boot files.

Let's use the command bcdboot.exe E:\Windows (in your case the command may be different, details below), this command restores the Windows 7 and Windows 8 boot loader - the bootmgr file and at the same time the BCD boot storage configuration files (the contents of the Boot folder)!

Loading into the Select menu Windows actions 8

and again go to the command line. We decide on the drive letters.

Enter the command:

diskpart

list volume

The drive is assigned the letter G:, and the hidden partition Reserved by the system, volume 350 MB, is assigned the letter C:. Operating system files with Windows folder are located on the E: drive, this is also visible.

and exit diskpart. On the command line we enter

bcdboot.exe E:\Windows

Attention: This command restores the Windows 7 and Windows 8 boot loader - the bootmgr file and at the same time the BCD boot storage configuration files (the contents of the Boot folder) in the hidden System Reserved partition, volume 100 or 350 MB, especially for the operating system located on drive E :\Windows.

Success. The download files have been successfully created.

If our error still appears, then we try something else.

Checking for errors

Error A disk read error occurred press ctrl+alt+del to restart may appear due to file system errors on the drive with the operating system C:.

You can check and correct file system errors using the Chkdsk utility, even if your operating system does not boot, we have a detailed article on this topic - the Chkdsk utility.

In a nutshell, you will have to boot from the recovery disk or Windows 8 installation disk, then go to the Select Action menu,

Select file types All files and click on Computer.

In the window that appears, we can easily identify the hidden System Reserved partition, with a volume of 350 MB under the letter C:, and we can also find the disk on which the operating system is installed. Let's look at the contents of all disks and find on disk E: operating folders Windows systems and Program Files.

Error A disk read error occurred press ctrl+alt+del to restart-28

The simplest and last option to get rid of the error A disk read error occurred press ctrl+alt+del to restart

Friends, if everything written above has made you despondent and you have already said goodbye to your operating system and programs installed more than one day, then it’s in vain!

There is a much simpler way than everything described above! Once I came across such a case, I tried all the known methods and all that was left was to reinstall Windows, but why reinstall when you can simply allocate space on your hard drive and install the same operating system next to it. The Master Boot Record (MBR) will be updated, the Windows boot loader will also be rewritten and the lost Windows will be automatically found. After installation second Windows, a boot menu will appear in which you can select the old operating system or the new one.

It's all done something like this.

First of all, you need to allocate free space on your hard drive to install the new Windows. We boot from the Acronis Disk Director boot disk and separate 20 GB from some partition, this is exactly what is needed for Windows installations 8 64-bit.

If you have a partition with unnecessary data, you can install a second operating system on it.

In my case, there was no need to create anything; I had a 40 GB partition on my hard drive with unnecessary data. I booted into Windows 8 installer

selected the desired partition and installed Windows 8 on it. The main thing is not to mix up the partitions and install new Windows 8 to the existing one.

After installing the second Windows 8, a menu appeared in which you could select old Windows 8 and the new one, both loaded and worked perfectly.



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