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.
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.
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 …
Schedule a scan in Microsoft Defender Antivirus
Learn how to schedule a Windows Defender Antivirus scan at a time and frequency that you choose.
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 …
Antivirus and antimalware software: FAQ - Microsoft Support
You can always download and run our on-demand security scanners, such as the Microsoft Safety Scanner or Microsoft Defender Offline. These scanners can be installed at the same …
Getting started with anti-malware in Microsoft Defender
If you're concerned and want to have Microsoft Defender run a scan right now, you can do that by going to the Device protection page from the Microsoft Defender dashboard.
Help protect my device with Windows Security - Microsoft Support
Schedule a scan in Windows Security Windows Security regularly scans your PC to help keep it safe. If you want to set your own scan schedule: In the search box on the taskbar, type Task …
如何在 Microsoft Defender 中開始掃描病毒或惡意代碼
如果您懷疑裝置可能有惡意代碼，您應該 Microsoft Defender 執行掃描。 以下說明如何在 Windows、Mac 或 Android 上執行此動作。
Remove specific prevalent malware with Windows Malicious …
Dec 9, 2025 · To manually run the tool multiple times a month, download the tool from the Download Center or by visiting the Microsoft Safety & Security Center website. For an online …