Microsoft has apologised for serving malware via its websites and Windows Live Messenger software.

“With Microsoft launching Vista along with their Defender software to protect users from viruses and spyware, it seems therefore to be an oxymoron that they have started to putting paid changing banner advertisements for malware, on the popular MSN groups servers.

“SystemDoctor2006 has made an appearance over the past few days, coming complete with pop-up windows to trap and then cause horrific damage to the computers of unaware users — causing them to then rush out to purchase Microsoft Defender?