Use the System File Checker tool to repair missing or corrupted system files - Microsoft Support. Windows 8.1 Windows 8.1 Enterprise Windows 8.1 Pro Windows 8 More... If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files.

Each release of the tool helps detect and remove current, prevalent malicious software. This malicious software includes viruses, worms, and Trojan horses. Microsoft uses several metrics to determine the prevalence of a malicious software family and the damage that can be associated with it.

Check the firewall settings. Firewall & network protection in Windows Security. Find out the risks of allowing apps through Windows Defender Firewall and how to add or remove apps from the list of approved apps.

The Gaming Services Repair Tool for PC is now also integrated directly into the Xbox app for PC. To run the Gaming Services Repair Tool on your PC, make sure you have the 2311.1001.7.0 version or newer of the Xbox app on PC installed. To check your Xbox app version number: Launch the Xbox app for PC. Click your Profile picture.

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.

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. Important: Before you use Microsoft Defender Offline, make sure to save any open files and close apps and programs. Open your Windows Security settings.

Check for Windows updates. Learn how to update drivers in Windows using Device Manager to update or reinstall a driver.

Action: Remove, Result: 0x00000000 regkey://HKLM\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\\v5mpn runkey://HKLM\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\\v5mpn file://c:\temp\mpncleantest.exe SigSeq: 0x00002267735A46E2 Results Summary: ----- Found Virus:Win32/MPnTestFile.2004 and Removed!

Follow the steps below to download and open the Support and Recovery Assistant according to your browser. Tip: The tool may take a few minutes to download and install. Edge or Chrome. In the lower-lower left or upper-right corner, right-click SaraSetup.exe > Open. Edge (older) or Internet Explorer.

From the Overview page, select Office apps and on that page, find the Microsoft 365 product you want to install and select Install. To install Microsoft 365 in a different language, or to install the 64-bit version, use the dropdown to find more options. Choose the language and bit version you want, and then select Install.