I have a Windows Vista Home Premium and I tried installing SP2 on it and It prompted me to install SP1. Then it stopped working when I installed SP1. I don't have back up that I can use to restore it. When I use the Windows Repair mode I am unable to get access to few options none of which is working. I do have access to the command prompt. Is there way to restore this? If I am planning to upgrade to Windows 7 Home Premium what are the steps?