Hi I am running two Win XP in the same HD and so I have a dual boot. My issue is that when I boot, appears a warning : MBR Error 3. But the two lines to boot, in the system1 or in the system 2 was ok. Then I used .iso SXdisk.exe from acronis to boot with it, and so repair the MBR Error 3. I do itr and after this boot, the screen told me to press the key <enter> to repair this MBR Error 3 boot displayed. I do it, and now I have a new warning: No commands for booting operation system. Press any key to reboot. Invalid operation system. Then I can't boot. Can someone help me?