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Microsoft Security Intelligence
Published May 19, 2005 | Updated Sep 15, 2017


Detected by Microsoft Defender Antivirus

Aliases: W32/Kelvir.worm.gen (McAfee) W32/Kelvir-Gen (Sophos)


Windows Defender Antivirus detects and removes this threat.
Win32/Kelvir is a family of worms that target PCs running certain versions of Microsoft Windows.
The worm spreads through MSN Messenger or Windows Messenger. The worm is activated when a user clicks a link in a Messenger message.

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.

Get more help

You can also visit 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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