Are there any common errors ?
What other security based software do you have that might block have an impact at boot, e.g. SpySweeper, Spyware Doctor (StartUpGuard), PrevX, WinPatrol, ProcessGuard, etc. ?

The last Program update was Version 4.7.892, September 25, 2006, is that the one you meant ?
There have been no Program updates around 31 Oct apart from VPS updates which shouldn’t have had that effect, unless a detection of a virus meant the removal of an important file, did you recently have any detections ?