We use cookies to provide you with a better experience. If you continue to use this site, we'll assume you're happy with this. Alternatively, click here to find out how to manage these cookies

hide cookie message
79,864 News Articles

Buggy Microsoft update labels Skype as adware

Error in antivirus definition update to blame

Skype users who have been getting strange error messages from Microsoft's security products over the past week can breathe easy now. It was all a mistake.

Microsoft said on Wednesday that a buggy antivirus definition update, released on Friday, had mislabelled Skype as pop-up adware program called Win32/Vundo.gen!D. The issue was fixed on Monday in a signature update so users who have version 1.31.9121.0 of Microsoft's malware signature file should be fine.

Microsoft's security products were not removing Skype, simply blocking it from running, so users should not have to install any new software once they've updated their antivirus definitions. "Once the signatures are updated on the user’s machine, Skype will operate normally," Microsoft's public relations agency said.

The buggy update affects Forefront Client Security, Windows Live OneCare and Windows Live OneCare Safety Scanner, but not Windows Defender or the Malicious Software Removal Tool that ships with Windows.

Microsoft's gaffe was an annoyance for users, but security products often mistakenly report legitimate software as malware, called a ‘false positive‘, by security experts. Two years ago, for example, Sophos identified legitimate Mac OS X files as malware.

Skype has blogged about the issue here.

The latest signature files can be downloaded here.


IDG UK Sites

45 Best Android games: top Android games for your smartphone or tablet in 2014 (24 are free!)

IDG UK Sites

How Apple, Adobe, Microsoft and others have let us down over UltraHD and hiDPI screens

IDG UK Sites

Do you have the X-Factor too? Mix Off app puts fans in the frame

IDG UK Sites

iPad Pro release date, rumours and leaked images - 12.9 screen 'coming in 2015'