I am running Win 7. Over the past week or so some of the Windows updates have not been installing. This weekend I had my geeky son working on my machine and it is a real Catch 22. Updates were not uniformly not installing or installing, so I had updated parts of the program conflicting with unupdated parts. Eventually we used the 'restore' function to reset the computer to its status 6 weeks ago (and had to use Safe Mode even to get that to work). We then attempted to install Service Pack 1 and still ran into issues because the machine was running Internet Explorer 8 rather than nine.
Long story short, I now have Internet Explorer 9 on the machine and the updates are updating appropriately BUT some of the single company proprietary websites are not able to deal with IE 9.
Upshot of story: You seem to get to choose between IE 8 and being able to work or IE 9 and being able to do Win 7 updates. Classic rock and a hard place. Luckily I have a Win XP desktop machine still running IE 8 so I can 'commute' between machines to check for work.