Hi, I am having a problem with the open windows dropping out too, it has been happening for a while and is getting worse all the time. I also have no repair option on either of the places you suggested Liam. (and the same patch as piton)
I looked at systerm repair, but i cant get that to open beyond the last restore point, and it would need to be restored way before that to work better.
As far as I can tell IE is all up to date (latest version etc).
This problem is starting to drive me crazy.
Thanks Delta