How to start a scan for viruses or malware in Microsoft Defender
If you suspect that your device may have malware you should have Microsoft Defender run a scan. Here's how to do that on Windows, Mac, or Android.
Stay Protected With the Windows Security App - Microsoft Support
Run a malware scan manually Run a quick scan Turn Defender Antivirus real-time protection on or off To learn more about the Windows Security app and all its features, see Windows …
Scan an item with Windows Security - Microsoft Support
You'll be notified immediately if any threats are found. To scan specific files or folders, right-click a file or folder, select Show more options, and then select Scan with Microsoft Defender. When …
Virus and Threat Protection in the Windows Security App
Learn how to use virus and threat protection options in Windows Security to scan your device for threats and view the results.
Antivirus and antimalware software: FAQ - Microsoft Support
What's the difference between a full scan and quick scan? A quick scan looks for viruses and other malware in all the places they are most likely to hide. It’s a good choice when you’re just …
Troubleshoot problems with detecting and removing malware
Scan couldn't complete Run scans while your PC is idle by closing all other programs
Remove specific prevalent malware with Windows Malicious …
Dec 9, 2025 · A full scan performs a quick scan and then a full scan of the computer, regardless of whether malicious software is found during the quick scan. This scan can take several hours …
File Explorer in Windows - Microsoft Support
Find and open File Explorer in Windows, and customize Quick access by pinning and removing files and folders.
Schedule a scan in Microsoft Defender Antivirus
Learn how to schedule a Windows Defender Antivirus scan at a time and frequency that you choose.
Install and use a scanner in Windows - Microsoft Support
Learn how to install a scanner and then use it to scan pictures and documents in Windows.