Again I apologize for the late reply and thank you ilko_t for advices! I mananged to solve the problem but I don't know how exactly! I created another boot stick Micro Cruz with 4GB space using Fat32 option and NTLDR for WinXP option, after that I disconnected my first drive, Hitachi 120GB, with Win7 partition and left the other driver WD Caviar Black 1TB connected. At the first boot screen I didn't have xp compatibility problems so I decided to connect the first drive and worked to, but I can't explain the situation. I didn't installed WinXp yet because I have some work with this OS. LE: If something happens I will post here for future problems. Thank you!