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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.
Automatically fix Windows security issues - Microsoft Support
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:
Turn Windows Security on or off - Microsoft Support
When you get a new device and start up Windows 10 for the first time, the antivirus protection that comes installed with the device is your default security app.
Game crashes due to antivirus scanning on Windows 10
Games & apps. Game crashes due to antivirus scanning on Windows 10. Notifications. Alert. Minecraft on PC Update Error. We are aware of an issue with the latest update to Minecraft on PC via the Xbox app. Check here for known game issues. Info. Questions about MLB The Show 24?
Remove malware from your Windows PC - Microsoft Support
Open your Windows Security settings. Select Virus & threat protection > Protection history. The Microsoft Defender Offline scan will automatically detect and remove or quarantine malware. 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.
Applies To: OneDrive (home or personal), OneDrive for Windows
Gaming Services Repair Tool for PC | Xbox Support
If you are having issues installing or updating Gaming Services on your PC, or if you are noticing that the Xbox app for PC is launching with missing content, you may want to download and run the Gaming Services Repair Tool for PC.
How to use the PC Health Check app - Microsoft Support
In Windows, use Search on the taskbar to search for “PC Health Check,” then select it from the list of results. If a PC Health Check update is available, you can quickly install it for the latest version.
List of security program cleanup and uninstall tools
Summary. This article describes how to identify and then remove all traces of a security program from a computer. To help prevent issues that may occur due to a conflict between programs, it is important to remove all other security programs before you install Microsoft Security Essentials (MSE). More Information.
Fix File Explorer if it won't open or start - Microsoft Support
Select Troubleshooting > View all > System Maintenance. On the System Maintenance troubleshooter, select Next > Try troubleshooting as an administrator and review the results. Check if system files are missing or corrupted
Improve my PC performance in Windows - Microsoft Support
Pause OneDrive syncing. Disable unnecessary startup programs. Check for and remove viruses and malware. Restore your PC from a system restore point. Tips to improve performance in Windows. If your Windows 10 PC is running slowly, there are some solutions you can try to help make it run better.