Find out how to boot into safe mode in Windows from Settings, the sign-in screen, and a black or blank screen.

Safe mode starts Windows with a minimal set of drivers and services to help troubleshoot issues. If a problem doesn't reappear when you start your PC in safe mode, you can eliminate the default settings and basic device drivers and services as possible causes.

If you're having trouble restarting, you can start your PC in safe mode. For more info, see Start your PC in safe mode in Windows. You can also try getting the latest updates with Windows Update, help from other sources, or restoring Windows to an earlier point in time.

The Advanced Boot Options screen lets you start Windows in advanced troubleshooting modes. You can access the menu by turning on your computer and pressing the F8 key before Windows starts. Some options, such as safe mode, start Windows in a limited state, where only the bare essentials are started.

Learn how to remove malware from your PC. Use Microsoft Defender Antivirus in Windows 10 or Windows 11 to scan your PC for malware, viruses, or other threats.

Manually perform safe mode troubleshooting. If you didn't use the Assistant, manually open Excel in safe mode. Do one of the following: If you are on Windows 11 or Windows 10, choose Start > All apps > Windows System > Run. Type Excel /safe in the Run box, and then click OK.