Learn how to use the System File Checker tool (SFC.exe) to scan and restore missing or corrupted system files in Windows. Follow the steps to run the tool, view the scan results, and manually replace the corrupted files if needed.

PC Health Check app helps you check your device compatibility, performance, and troubleshoot issues for Windows 11. It also provides updates, backup, and sync features for your Windows PC.

System File Checker is a utility in Windows that checks for problems with files on your computer. To run it, follow these steps: type command prompt, type DISM.exe /Online /Cleanup-image /Restorehealth, and then type sfc /scannow.

Learn how to use the Windows Security Troubleshooter to diagnose and repair Windows security problems by turning on UAC, DEP, Windows Firewall, and other features. The troubleshooter works for Windows 7, 8, 8.1, and 10 in different languages.

Learn how to use Microsoft Defender Antivirus to scan and remove malware from your PC. Follow the steps to run an offline scan, view the results, and take action against detected threats.

Learn how to use the Program Install and Uninstall troubleshooter to fix corrupted registry keys, prevent programs from being installed or removed, and access the product code. The troubleshooter runs on Windows 10, 8.1, 8, and 7.

Learn how to use various built-in tools to customize and monitor your Windows device. Find out how to access and use Settings, Task Manager, Computer Management, Event Viewer, Control Panel, and more.

Windows 10 has replaced fix-it tools with troubleshooters to help you solve problems with your PC. Learn how to run a troubleshooter, where to find it, and what to do if it doesn't work.

Learn how to locate your BitLocker recovery key, a 48-digit number needed to unlock an encrypted drive in Windows. See where to find it attached to your Microsoft account, work or school account, printout, or USB flash drive.

Learn how to start a quick or deep scan for malware on Windows, Android, or Mac devices with Microsoft Defender. Find out the signs of infection and how to protect yourself from fraud.