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Published Apr 12, 2011 | Updated Sep 15, 2017


Detected by Microsoft Defender Antivirus

Aliases: CoreFlood.dr (McAfee) Troj/CoreFl-Gen (Sophos)


Windows Defender  detects and removes this threat.

Win32/Afcore is a trojan that connects to a remote server to retrieve commands that are executed on the affected computer.

This trojan can also install other malware or unwanted software onto your PC.

Find out ways that malware can get on your PC.


Use the following free Microsoft software to detect and remove this threat:

You should also run a full scan. A full scan might find hidden malware.

Use cloud protection

The Microsoft Active Protection Service (MAPS) uses cloud protection to help guard against the latest malware threats. It’s turned on by default for Microsoft Security Essentials and Windows Defender for Windows 10. 

Get more help

You can also see our advanced troubleshooting page or search the Microsoft virus and malware community for more help.

If you’re using Windows XP, see our Windows XP end of support page.

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