It's actually even worse than I thought...I can't access any program files without an error message. Some of the ones I used yestrday I can't open this morning. Do you think there's something in the critical update that's causing a virus? I assumed the (failed) update was my problem as there are so many posts at the MS support site already with the same problems.
The update is still available at the MS site...I wouldn't go there for the update if you haven't already!
Laurie