Secrets of Command Operation Windows 10 Fallback

The Windows 10 system rollback operation allows users to choose to return to the previous version to continue using when there is a problem with the system. However, there is a time limit for the rollback, and it will be invalidated after expiration. In fact, the rollback time is not static, and the user can use the system DISM command during the rollback validity period to personally control it. In addition, the rollback operation can also be done directly with commands.

Tips: the time limit, conditions and conventional methods of system rollback

During the limited time of upgrading to Windows 10 (the default is 30 days for earlier versions, and 10 days for new versions), the following visual operations can be used to implement system rollback: select "Start" button → Settings → Update and Security → Restore, and then select "Back" "Go back to the previous version of Windows 10" under "Start Now" to go back.

The system rollback will retain personal files, but will delete the apps and drivers installed after the upgrade, as well as any changes made to the settings. System rollback has strict conditions, otherwise it cannot be completed. The specific conditions are: keep all the contents in the windows.old and $windows.~bt folders after the upgrade; if you have used Windows 7 or Windows 8.1, you must know its login password; if you have used a USB drive for the upgrade, be prepared The drive.

1. Modify the rollback waiting time

Since there are 30 days and 10 days in the default time for the rollback waiting of Windows 10, how many days is the specific rollback time of the system you are using? This can be viewed by entering the administrator command prompt window during the valid period of the rollback and using the following DISM command:

DISM /Online /Get-OSUninstallWindow

It can be seen from the figure that "Uninstall Window: 10" is displayed in this example, which means that the waiting time for the system to roll back is 10 days.

If you want to extend the system rollback waiting time to 60 days, you can use the following command from the administrator command prompt window during the rollback validity period:

DISM /Online /Set-OSUninstallWindow /Value:60

When "Operation completed successfully" is displayed, the modification is valid. In order to verify the modified rollback time, use the above "DISM /Online /Get-OSUninstallWindow" command again, you can see that the rollback valid time has become 60 days.

hint:

After the system rollback time has elapsed, executing the above command will display a prompt that Element not found or the option is unknown. The reason is that the related fallback value in the system has been deleted by Windows.

2. Use the command to perform the rollback operation

The rollback operation can be performed when the rollback conditions are met. In addition to using the graphical interface to roll back, you can also directly use the following commands:

DISM /Online /Initiate-OSUninstall

hint:

After a newly created account or other attempts to restore/restore factory settings, the rollback function will become invalid.

In addition, the "DISM /Online /Remove-OSUninstall" command can be used to automatically delete the system files required for the rollback to free up space for other uses.