Hi there. I pre-ordered a Windows 7 Home Premium upgrade from Vista, not knowing my employer would not let me use it and connect to its system until now. i downloaded the compatibility checker, no problems. But now, when the upgrade starts with the DVD, it sticks during the compatibility check - two to three hours, then I give up and cancel. I really don't know what to do. I have a full system backup using TeraByte Image for Windows, but I don't know what to restore after installing Windows 7 if I do a clean install. Any help greatly appreciated. Happy Labor Day, USA.