Normally, you can revert from Windows 10 to Windows 11 within 10 days of upgrading.
By default, you cannot revert after 10 days, but by running the command introduced here, you can extend it up to 60 days.
Extend your time to go back to Windows 10
Please note that this command will only be effective if you run it within 10 days of upgrading to Windows 11.
Reasons why you must do this within 10 days:
After 10 days have passed since upgrading, Windows will recognize that there is no need to revert to the previous version and will automatically delete the files needed to revert to Windows 10.
The files for restoring to Windows 10 are saved as a "Windows.old" folder directly under the C: drive. If you accidentally delete this folder, you will not be able to restore to Windows 10.
■Delete temporary files (Windows Update cleanup)If you do, the Windows.old folder will be deleted.
Command to check how long you can go back to Windows 10
1.Start buttonRight-click and click Terminal.
2. Windows PowerShell will open, so enter the following command and press Enter.
DISM /Online /Get-OSUninstallWindow3. Check the number after "Uninstall window:".
In the image below, you can see "10." This is the period during which you can revert to Windows 10 after upgrading.
4. Next is the command to change the period during which you can downgrade.
DISM /Online /Set-OSUninstallWindow /Value:<days>
Enter the number of days.
For example, if you want to set it to the 20th, you would use the following:
DISM /Online /Set-OSUninstallWindow /Value:20
The number of days ranges from 2 to 60 days.Can be set.
Microsoft says "Passing a value < 2 or > 60 will set the default value to 10."
In other words, If you set it to 0-1 or 61 or more, it will be set to 10 days.
5. After setting the number of days, run the confirmation command again to check whether the settings have been updated.
When you run the command, an error occurs
If there are no files to restore (they have been deleted) or if you have not upgraded in the first place, you will see the message "Error: 1168 Element vote found."
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