hi please help me! i just upgraded my windows 7 starter in toshiba netbook to windows 7 ultimate by keying in reg number using windows 7 anytime upgrade. Then the msg said it was upgrading and restarted. when it was logging off, upgrading windows was only 30% complete and then it shut down. when i started the netbook, windows won't start. the msg is start windows normally or system repair. tried both but no success. can't even start windows using safe mode, using last configuration settings etc. be an angel pls help me 