It’s always a good idea to have backups, anyway-especially when reinstalling an operating system. The roll-back process within the first 10 days should keep your files on hand, but the full reinstallation process will delete everything on your drive. Warning: Be sure to back up your important files before continuing. This process is a full Windows reinstall-you’ll be replacing Windows 11 with a fresh Windows 10 system, which you’ll have to set up from scratch. Second, if it’s been more than 10 days, you can reinstall Windows 10 on your computer. (It would be nice if Windows 11 gave testers longer than 10 days to roll back, but it doesn’t.) This “Roll Back” feature is primarily intended as an emergency “Undo” button if you run into a bug with a new build of Windows.
You can also manually remove them with a tool like Disk Cleanup.
After 10 days, Windows deletes them from your internal drive to free up space. This option is only available for 10 days because Windows only keeps your old operating system files for 10 days.
