Final answer:
To reinstall Windows and keep your personal files, use the 'Reset this PC' command, which allows you to reset your system to a fresh state without losing personal documents and files.
Step-by-step explanation:
To reinstall Windows but keep your personal files, you should use the Reset this PC command. This feature is built into Windows 10 and Windows 11 and offers a way to perform a clean installation of the operating system while preserving your documents, photos, and other personal files. It can be a useful tool if your PC is running slowly, you're encountering errors that you can't resolve, or you're preparing to sell or give away your PC and want to ensure it's running a fresh copy of Windows.
When you use the Reset this PC option, you will typically be given a choice to either "Keep my files" - which removes apps and settings but keeps your personal files, or "Remove everything" - which removes all of your personal files, apps, and settings. Choosing "Keep my files" is the way to go if you want to refresh your Windows installation without losing your documents.