I'm trying to install O.B.S. (Open Bradcasting Software), but it requires Service Pack 2. I tried updating to Service Pack1, since I just re-installed Windows on my computer. It goes as far as to download and "install" it, but doesn't ask to restart the computer. And when I do restart the computer, and check for updates, ittells me that the only update available is SP1. THoughts as to what's wrong with it?