If you are thinking about upgrading to Windows 11 from Windows 10, then changing this setting can save you a major headache. The "go back to previous version of Windows" is only 10 days by default, this not enough time to decide whether you like Windows 11 or not and if you go past 10 days, you will be force to do a fresh install of Windows 10 if you want to go back. But you can extend the "Go Back Windows 10" option for up to 60 days. I will show you how.