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.

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. Note: Use these steps for Windows programs.

System Configuration is a system utility that allows you to troubleshoot issues with Windows startup. It provides options to customize the startup process, including the ability to enable or disable software, control startup services, and access other advanced system settings.

Real-time protection is a feature in the Windows Security app that continuously monitors your device for potential threats such as viruses, malware, and spyware. This feature ensures that your device is actively protected by scanning files and programs as they are accessed or executed.

Alternatively, if installation doesn't start automatically, browse the disc to find the program setup file, usually called Setup.exe or Install.exe. Open the file to start installation. How to install programs from online sources on Windows 10

Use the uninstall troubleshooter to uninstall Microsoft 365, Office 2021, Office 2019, or Office 2016 from your Windows PC. Select the button below to start the uninstall troubleshooter. Click Open if you get a pop-up window indicating This site is trying to open Get Help.

Here's how to do that on Windows, Mac, or Android.

Follow the steps in the section, How to start the Windows Installer service when system services are not loaded. Then try installing or uninstalling the app or update again. If the installation or uninstallation is successful, your issue is resolved.

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.

To fix this problem, you’ll need to reset the Store, clear the Store cache, and run the Windows Update troubleshooter: To clear the Microsoft Store cache, press the Windows Logo Key + R to open the Run dialog box, then type wsreset.exe and select OK.