Find and click Reinstall now .
This is the most effective way to repair a system that still boots. You "reinstall" Windows over itself while it's running. download windows to repair
Reinstall Windows with the installation media - Microsoft Support Find and click Reinstall now
If your PC still boots but is acting buggy, Windows 11 has a built-in feature that downloads a fresh "repair version" of the OS through Windows Update. Open > System > Recovery . download windows to repair