If your computer slowed down, started showing errors or gets stuck at startup after you installed a program, updated a driver or changed a setting, you often do not need to reinstall Windows. The System Restore feature in Windows takes system files, registry settings and installed programs back to how they were at an earlier restore point; it does not touch your documents, photos or other personal files.
According to Microsoft, the System Protection feature behind it is not turned on by default. So in the first half of this guide we turn protection on and create a point by hand; in the second half we show how to roll back when something goes wrong, both from within Windows and from the Recovery Environment when Windows will not start. The steps are the same on Windows 11 and Windows 10.