If the backup fails or cannot be restored, you can troubleshoot and solve the problem by following the steps below: 1. Check whether the backup target is normal, including device connection, storage space and network path; 2. Make sure the backup settings are correct, check the backup scope and file usage; 3. Run system tools such as sfc and DISM to repair system errors; 4. Make sure that the permissions are sufficient during restoration and try safe mode operation. Most problems can be solved by themselves through the above methods.

There are problems with Windows backup and restore, and the most common ones are "backup failed" or "cannot restore". When encountering this situation, don’t rush to reinstall the system. First look at the following directions. Many problems can actually be solved by yourself.

1. Check whether the backup target is normal

Many backup failure problems are actually caused by problems with the storage device. For example, if the external hard disk is not plugged in properly, the partition is damaged, there is insufficient space, or the network path is unavailable.

• Make sure that the external hard drive can be recognized by the system and that the drive letter can be seen in "this computer".
• Check if there is enough space for the backup target. Windows backup will prompt how much space is needed, and it is recommended to reserve more.
• If you use network location backup, ensure that the network connection is stable and the path is correct (for example: \\NAS\Backup ).
• Try re-plug the device, or try again after restarting the computer.

Sometimes, the system prompts "The backup device cannot be accessed". At this time, you can try to reselect the backup target in "Control Panel > Backup and Restore".

2. Is the backup settings correct?

Not all files will be automatically backed up. By default, Windows backup will only backup system files and user folders (such as "Documents", "Desktop", etc.), and may not be within the backup scope if you have custom paths or program data.

• Go to "Settings > System > About > Advanced Settings > Backup Options" to check whether the folder you want to back up is selected.
• If you are using File History, make sure that all libraries that need to be backed up are enabled.
• Data from certain programs (such as Outlook personal folder.pst) needs to be added manually to the backup list.

If the backup settings are OK, but each backup is stuck in a file or directory, it may be that the file is damaged or occupied by other programs.

3. Use system tools to fix backup errors

Windows comes with some repair tools that can be used to solve common backup failure problems.

• Open a command prompt (administrator permissions) and run the following command:
  • sfc /scannow : Check system file integrity.
  • DISM /Online /Cleanup-Image /RestoreHealth : Fix system image issues.
• Run Troubleshooter:
  • Go to "Settings > System > Storage > Advanced Storage Settings > Troubleshooting" to run the relevant check.
• If there is a problem with the Backup and Restore feature, you can try to re-enable the feature in Enable or Turn off Windows Features.

These tools can solve many hidden system problems, such as permission errors, service failure, file corruption, etc.

4. The backup cannot be found or failed during restore

Sometimes the backup is successful, but the backup file cannot be found during the restoration, or an error occurred during the restoration process.

• Confirm whether the account permissions used during the restore are sufficient, and some backups can only be restored by the account that created it.
• If you are using System Restore Point to restore the system settings, make sure that the restore point has not been deleted or corrupted.
• In Control Panel > Backup and Restore, click Restore My Files, and browse for the backup file to exist.
• If the system fails to boot, you can try using the installation USB drive to go to "Repair Computer > Troubleshooting > Advanced Options > System Restore".

Sometimes the restore fails because the target file is being used, such as a system file or a running program file. It is recommended to try restoring in safe mode.

Basically, these common problems and solutions. Although the Windows backup mechanism is not complicated, it involves many details. When encountering problems, don’t rush to change the software. First check these basic directions.

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