Use the System File Checker tool to repair missing or corrupted system files. When critical Windows system files are missing or corrupted, some Windows features may stop working correctly or Windows may stop responding altogether.

Windows Update can help fix problems with your PC. Fix problems using Windows Update is a recovery tool that can help resolve issues related to updates. Using this tool will reinstall the current version of Windows on your device. This tool preserves all your apps, documents, and settings.

Instead of fix-it tools, Windows 10 uses troubleshooters to help you solve problems. To run a troubleshooter, use the following steps: Select Start > Settings > Update & Security > Troubleshoot > Additional troubleshooters, and then select Additional troubleshooters.

Startup Repair is a Windows recovery tool that can fix certain system problems that might prevent Windows from starting. It scans your computer for the problem and then tries to fix it so your computer can start correctly.

Follow these steps to automatically diagnose and repair Windows security problems by turning on UAC, DEP protection, Windows Firewall, and other Windows security options and features. Select the Download button on this page. In the File Download dialog box, click Run or Open, and then follow the steps in the Windows Security Troubleshooter. Notes:

Windows 11, version 24H2 includes all the features and capabilities delivered as part of continuous innovation to Windows 11, now enabled by default. This scoped release also features enhancements designed to improve your overall experience with Windows 11. Highlights include:

Right-click the program you want to fix and select Repair, or if that’s not available, select Change. Then follow the directions on the screen. For more tips, see Repair an Office application. You can also remove apps or programs. Repair programs in Control Panel.

Learn how to run Windows Update Troubleshooter to resolve errors downloading or installing Windows updates.

PC Health Check app brings you up to date info on your Windows device health, helping you take action to improve your device performance and troubleshoot performance problems. It is periodically updated based on customer feedback to help you make the most of your Windows PC. How to open PC Health Check.

After October 14, 2025, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows 10. Your PC will still work, but we recommend moving to Windows 11. Learn more.