Was a little busy, but thanks for all the advice
Now I have different problem, as my dvd stopped to read dvd's so I can't install Win all over, but I think I'll have to do a bootable pendrive with Windows 7, never mind. So thanks again for this and I'll try this bootable Mini Tool.
BTW, as I have laptop and replacing dvd will mean disassembling all my pc (dvd is below motherboard
), what do you think it could be? Just DVD gone bad (I checked and don't have upper or lower filters in regedit, usb dvd reads discs) or could it be just dirty lens?