Microsoft Defender on Android Microsoft Defender on Mac Microsoft Defender on Windows More...Less
Malware is malicious softwareand it comes in a lot of different varieties. Viruses, ransomware, spyware, and more are all types of malware. Microsoft Defender has powerful built-in features that can help protect your device against malware.
Note:Microsoft Defender currently offers anti-malware only on Windows, Mac, and Android.
When you first set-upMicrosoft Defenderon your device we'll run an initial scan to make sure you're starting off clean.
Using anti-malware on your device
Microsoft Defender's real-time anti-malware protection runs whenever your device is on,keeping an eye out for malicious activity.
Microsoft Defenderwill also run quick scans of your device on a daily basis, in case anything manages to elude the real-time protection.
If it spots something it will attempt to block it, and alert you so that you can take action if necessary.
If you're concerned and want to haveMicrosoft Defenderrun a scan right now, you can do that by going to the Device protection page from the Microsoft Defenderdashboard. For more information seeHow to start a scan for malware in Microsoft Defender
What if Defender finds malware?
If Defender finds malware on your device it'll block it, notify you, and try to remove the malware if it can. In some instances Defender may need you to take some actions such as quarantining or removing the dangerous file or process.
For more information seeWhat if Defender finds malware on my device?
Learn more
Protect yourself from malware and phishing
How malware can infect your PC
Need more help?
Want more options?
Discover Community
Explore subscription benefits, browse training courses, learn how to secure your device, and more.
Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.