[WindowsCentral.com]

If your Windows 11 PC is slow or causing problems, you can reset it to the default factory settings, and here's how.
On Windows 11, if you have been using the same setup for a long time or are experiencing issues with the computer, you can use the "Reset this PC" feature to revert the system to factory default settings to resolve most common problems and improve performance.

Full story from the WindowsCentral blog...