Performing a fresh or “clean” installation of Windows can improve responsiveness and performance on your PC if you have been using it for an extended period. The OS starts to lag after prolonged use.

Once your computer has booted up to the Personalization Screen (Windows 8 and Windows 10) or “Set Up Windows” screen (Windows Vista), you can create a user account and login to the desktop. Windows ...

This process is called a clean install, which is ironic as there's nothing particularly clean about it: Microsoft has enshittified Windows Setup.