Since i had a Windows Mediaplayer 12- not playing anything and not starting anything problem i tried out everything which had been advised. at the end i tried Regvac and did one step too much. got bluescreen at start. couldnt repair, couldnt use systemrestauration. and didnt know how to start with clean boot(asked for drivers) and reinstallation of SP1.
had big problems with windows updates installations. was using winfuture updatepack. at the end it worked. have saved all data.
had no space for a systempartition backup. should have done the allocations on a 2TB-drive earlier-see other thread about Secure Zone-hidden space of Trueimage.
Can i now install win7 over the old one. will my own folders stay in place? maybe i can do a repairinstallation?