Hi, I have flashed BIOS, installed BENQ license on OEM 7 ultimate but I can't find OEM SLP key for BENQ model for Ultimate I have try to install key of another vendor and windows set up 3 day activation. Then I removed product key slmgr.vbs - upk and now I have black screen on desktop and activation window on startup. Is it possible to somehow repair system and try to install another product key? Can anybody help me to find BENQ SLP key for 7 Ultimate???