If Windows 11 cannot open normally, Command Prompt from Windows Recovery Environment can launch System Restore. This works only when restore points exist and the system drive is accessible.

In WinRE, drive letters may be different from normal Windows. If the command is not found, try opening the Windows drive first or run repair commands such as sfc /scannow only when you know which drive contains Windows. Avoid using disk-cleaning commands before files are backed up.
System Restore does not recover every lost file, fix severe disk failure, or rebuild a missing Windows installation. If the drive has bad sectors, keeps disappearing, or asks to be formatted, recover or back up data before running more repairs.
Step 1. Open Qiling Backup when Windows is working and choose System Backup.

Step 2. Select a safe destination, preferably an external drive or network location.
Step 3. Click Proceed. Keep the bootable rescue media with the image so you can restore Windows even when restore points are missing.
Command Prompt can launch Windows 11 System Restore, but restore points have limits. Keep a system image backup for major failures and disk problems.