How to Troubleshoot an Error When You Run the Microsoft Windows Malicious Software Removal Tool

Running the Microsoft Windows Malicious Software Removal Tool (MSRT) is an effective way to detect and eliminate prevalent malware infections from your Windows computer. However, encountering errors during its operation can be frustrating and may prevent your system from being properly scanned or cleaned. This guide offers a comprehensive, step-by-step approach to troubleshoot and resolve common errors when using MSRT, helping you keep your PC secure and running smoothly.

What You’ll Need

• A Windows PC with administrative privileges
• Stable internet connection (for updates and downloads)
• Basic familiarity with Windows operating system
• Optional: Windows Update troubleshooter or system repair tools

Step-by-Step

1. Ensure Your System Is Up to Date
   Before running MSRT, verify that your Windows operating system is fully updated. Go to Settings > Update & Security > Windows Update and click on “Check for updates.” Installing the latest updates can fix underlying issues and improve tool compatibility.
2. Download the Latest MSRT Version
   Visit the official Microsoft support website and download the latest version of the Malicious Software Removal Tool. Using outdated versions can lead to errors or incomplete scans. Save the file to a known location, such as your desktop.
3. Run MSRT as Administrator
   Right-click the downloaded MSRT file and select “Run as administrator.” This ensures the tool has the necessary permissions to perform deep scans and remove threats effectively. If prompted by User Account Control (UAC), click “Yes” to continue.
4. Check for Error Messages During Execution
   Observe the progress and note any error messages that appear. If an error code or message is displayed, record it for further troubleshooting. Common errors include network issues, corrupted files, or permission problems.
5. Review Windows Event Viewer Logs
   If MSRT reports errors, open the Event Viewer by typing “Event Viewer” into the Windows search bar and selecting the app. Navigate to Windows Logs > Application and look for recent error entries related to MSRT. These logs can provide clues about the cause of the error.
6. Run Windows Troubleshooter for Windows Update and System Files
   Use built-in troubleshooters to fix underlying system issues. Go to Settings > Update & Security > Troubleshoot > Additional troubleshooters. Run the “Windows Update” troubleshooter and the “System File Checker” (by opening Command Prompt as administrator and running “sfc /scannow”). These tools can repair corrupted system files that interfere with MSRT.
7. Disable Antivirus or Firewall Temporarily
   Sometimes, third-party security software can block MSRT or cause errors. Temporarily disable your antivirus or firewall, then rerun the tool. Remember to re-enable security features after testing.
8. Perform a Clean Boot
   To eliminate interference from background programs, perform a clean boot. Type “msconfig” into the search bar, open System Configuration, go to the Services tab, check “Hide all Microsoft services,” then click “Disable all.” Restart your PC and try running MSRT again.
9. Check Disk and System Integrity
   Run disk check and system integrity scans to ensure your drive and system files are healthy. Open Command Prompt as administrator and run “chkdsk /f /r” followed by a restart. Additionally, run “DISM /Online /Cleanup-Image /RestoreHealth” to repair Windows images.
10. Reinstall or Reset MSRT
    If errors persist, delete the current MSRT files, then download and reinstall the latest version. Alternatively, use Windows Defender or other built-in tools to perform a comprehensive scan if MSRT continues to malfunction.

Common Mistakes

• Running MSRT without administrator privileges, which can prevent it from making necessary system changes.
• Using outdated versions of MSRT or ignoring Windows updates, leading to compatibility issues.
• Disabling security software without re-enabling it afterward, risking exposure to threats.
• Ignoring error messages or logs, missing critical clues needed for troubleshooting.
• Performing scans on a heavily fragmented or corrupted disk without prior maintenance.

Tips

• Always back up your important data before performing system scans or repairs.
• Run MSRT periodically, especially after major Windows updates or suspected malware infections.
• Keep your Windows and security software updated to improve compatibility and security.
• Use the Microsoft Safety Scanner or Windows Defender as additional malware removal options.
• If errors persist, consider seeking professional technical support or using advanced malware removal tools.

Troubleshooting

If you encounter issues during or after running MSRT, follow these steps:

• Identify the Error: Note any error codes or messages. Search online for specific solutions related to those errors.
• Check Internet Connectivity: Ensure your PC has a stable internet connection, as MSRT may need to download updates or definitions.
• Update Windows and MSRT: Confirm both are fully up to date. Sometimes, errors are caused by outdated software.
• Run System Diagnostics: Use Windows troubleshooting tools or third-party diagnostics to identify hardware or system issues.
• Perform a System Restore: If errors started after recent changes, revert your system to a previous restore point.
• Reinstall Windows: As a last resort, consider reinstalling Windows if persistent errors prevent malware removal or system stability.

Frequently Asked Questions

1. Why does MSRT fail to run on my computer?

This can happen due to outdated software, lack of administrator privileges, corrupted system files, or interference from security software. Ensuring your system is up to date and running as administrator often resolves this.

2. How often should I run the Malicious Software Removal Tool?

Microsoft recommends running MSRT periodically, especially after major updates or suspected malware infections. Once a month is a good practice for regular maintenance.

3. Can MSRT remove all types of malware?

MSRT is designed to detect and remove prevalent malware but may not catch all threats. For comprehensive protection, use multiple security tools, including real-time antivirus and anti-malware software.

4. What should I do if MSRT reports that it found threats but cannot remove them?

If threats cannot be removed automatically, follow the specific instructions provided in the report. You may need to run additional malware removal tools or seek professional help.

5. Is it safe to disable my antivirus software temporarily to run MSRT?

Disabling antivirus software can be risky but may be necessary if it’s blocking MSRT. Always re-enable it immediately after the scan to protect your system.

6. What other tools can I use if MSRT keeps failing?

Consider using Windows Defender, Malwarebytes, or other reputable malware removal tools. These can complement MSRT and help ensure your system is clean.

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