My laptop seems to have become constipated and I can't get updates to install. There are 3 important ones, include Windows 7 Service Pack 1. It downloaded and worked on installing for about an hour and didn't make more than about 25% progress. I triied downloading just one of the 3, not the service pack. No progress on installing. Doing a restart now, but it's stuck trying to install an update that I tried to stop. Suggestions please.