Just saw this in a major Dutch paper, and figured I would repost it. Yesterday, apparently a faulty update (Update 5958) was released by MacAffee anti-virus. Computers running it will falsely recognise the Windows process svchost.exe as being infected with a virus, causing it to be moved into quarantined. This will cause a crashing system (BSOD (Blue Screens Of Death) or random reboots). Instructions on how to handle this problem can be found here.
yeah our government departments here had this on around a 1000 computers yesterday. Needless to say it caused a bit of havoc for some. ;)