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Use the System File Checker tool to repair missing or corrupted system ...
To do this, follow these steps: Open an elevated command prompt. To do this, do the following as your appropriate: If you are running Windows 10, Windows 8.1 or Windows 8, first run the inbox Deployment Image Servicing and Management (DISM) tool prior to running the System File Checker.
Check your device performance and health in Windows Security
To help you keep your device secure, Windows Security monitors your device for security issues and provides a health report, which appears on the Device performance & health page. The Health report alerts you to common issues in four key areas and offers recommendations to remedy them.
Open Device Manager - Microsoft Support
Windows 10. In the search box on the taskbar, type device manager, then select Device Manager from the menu. Open Device Manager.
Update drivers manually in Windows - Microsoft Support
Select Update Driver. If Windows doesn't find a new driver, you can try looking for one on the device manufacturer's website and follow their instructions. Reinstall the device driver. In the search box on the taskbar, enter device manager, then select Device Manager.
How to use the PC Health Check app - Microsoft Support
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.
Troubleshoot external monitor connections in Windows 10
Windows 10. Before considering troubleshooting options, make sure your device is up to date. Select Start > Settings > Update & Security > Windows Update , then select Check for updates. If you need help setting up your external monitors, see How to use multiple monitors in Windows 10.
Remove malware from your Windows PC - Microsoft Support
Manage. Remove malware from your Windows PC. OneDrive (home or personal)OneDrive for Windows. Microsoft Defender Antivirus is a powerful tool that finds and removes malware from your PC. Here's how to use it in Windows 10 or 11 to scan your PC.
Applies To: OneDrive (home or personal), OneDrive for Windows
How to start a scan for viruses or malware in Microsoft Defender
When would I want to run a scan? If you suspect your device may be infected, or if you want to confirm that a previous infection appears to be cleaned, you should have Defender start a scan. Signs that your device might have malware include: Suddenly running much slower than usual. Significant decrease in battery life.
Applies To: Microsoft Defender on Android, Microsoft Defender on Mac, Microsoft Defender on Windows
View your system info - Microsoft Support
Windows 10. Type info in the search box on your taskbar, and then select System Information. View your system info.
Device protection in Windows Security - Microsoft Support
Security Windows 10 Windows 11. Windows Security provides built-in security options to help protect your device from malicious software attacks. To access the features described below, tap the Windows Start button, type windows security, select it from the results, and then select Device security.