I tried downloading the Service Pack for Vista on my computer last night. It was about to finish step 1 when it said that the service pack did not install and reverting changes. It then preceded to shut down. I have been getting the same message all night! All the answers I have found online the people were able to get to their start menu but I can't even get to that because every time it restarts it tells me service pack did not install and it tells me it is shutting down! WHAT DO I DO? PLEASE HELP!!!