Hmmm.... I was thinking the task bar component would be what was causing the problem. Looks like that goes all the way back to November, so I was on the wrong trail regarding that. It's strange that it's getting those errors... that's a separate problem, though.
So, there's no message box that pops up or anything?
Are you using joysticks or plugins or anything like that? (should have asked these first)
I'm not sure where to guide you on this, as VA was working fine until there was an update and then after the update, VA no longer works. If it was a little more widespread, I would have something to go by. Do you have a system image prior to the update?
Still applying updates on my Win 7 machine to try to reproduce. There was a problem and it shut off in the night o_O