Use this tool to find and remove specific prevalent threats and reverse the changes that they made (see Covered malware families). For comprehensive malware detection and removal, consider using Windows Defender Offline or Microsoft Safety Scanner.

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.

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

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.

Get security info and tips about threat prevention, detection, and troubleshooting. Including tech support scams, phishing, and malware.

Here are some ways to deal with phishing and spoofing scams in Outlook.com. Spoof intelligence in Exchange Online Protection helps prevent phishing messages from reaching your Outlook inbox. Outlook verifies that the sender is who they say they are and marks malicious messages as junk email.

To uninstall unwanted antimalware software: Go to Start > Settings > Apps. Find the unwanted app or apps and select it. Select Uninstall.

If you cannot open your Outlook data file or suspect that the file is damaged, use the Inbox Repair tool (scanpst.exe) to repair errors in the file.

Get Help has troubleshooters you can run for many common scenarios. These often help resolve issues without the need to contact support. If a troubleshooter is available for your issue, select Start to run that troubleshooter. After you run any troubleshooter, Get Help provides details on any findings and suggestions for possible remedies.

To invoke the classic Outlook diagnostics in the Get Help app directly go to Classic Outlook troubleshooters. Output from the classic Outlook Get Help diagnostic go to this folder, %LocalAppData%\GetHelp. There are some scenarios where the Get Help troubleshooters may not work.