Following on from my post yesterday, it seems as though the issue, dubbed “Black screen of death”, has been narrowed down to a Malware issue, and not a security update as previously reported. Microsoft have written a brief report on what they believe is the cause.
Prevx are still offering their “fix” from their website, together [...]

BBC News have reported on an issue with Windows 7 whereby when a user logs in, all he / she is presented with is a black screen with the “Computer” desktop icon, no taskbar and no other icons. This has also affected Vista and XP users, and has apparently been caused by a security update [...]