I currently have vista home premium on a 500gb drive, ubuntu on another 500gb drive, and 1 tb drive that both operating systems can access. The vista install is somewhat corrupted and I figured now would be a good time to upgrade to Windows 7 ultimate. I have the full install disc for windows 7. My vista install works still, but it is so much of a pain that I hate using it. There are too many files and programs to backup and then transfer back to the new windows 7 install. How would I upgrade using the disc I have without harming my linux install and retaining all of my programs and files?