Earlier today we noted the discovery and description of a new piece of malware for Mac OS X dubbed the "Oompa-Loompa Trojan (OSX/Oomp-A)." [See previous coverage] As previously noted, the malware was ...

The strange interaction of a parasitic wasp, the caterpillar in which it lays its eggs and a virus that helps it overcome the caterpillar's immune defenses has some scientists rethinking the ...

The Avast virus definitions update failed error usually occurs when trying to update the virus definitions of the desktop version of the app. It’s usually caused by ...

Although widespread virus outbreaks may be a thing of the past, the total amount of malicious software being written is on the rise, says McAfee Inc. On Tuesday, the security vendor added the ...

A number of Windows 7 and 8.1 users are encountering problems with Microsoft Security Essentials and Windows Defender. Users are seeing their automatic anti-malware protection turned off without their ...

The style and purpose of viruses runs the gamut. Following is a small sampling. See Sophos and virus. The fastest spreading virus in history appears to have been written by a resident of Manila in the ...

Anti-virus software works by comparing the files on your computers and those you access online to a database of known viruses, known as virus definitions. Without regularly updated definitions, an ...

An email virus launched in November 1999 that affected English and Spanish versions of Microsoft Outlook running with Windows 98 or 2000 and Internet Explorer 5. It did not do any harm, but sent out ...

When updating Windows Defender, you may encounter the error code 0x80004004. It happens when Windows Defender fails to download updated definitions from the Microsoft ...