Hi, I installed first Windows XP in a IDE hard disk, then installed Windows 7 (7100) 64 Ultimate in a SATA hard disk. The Windows 7 and the dual booting were working perfectly. Today, I disconnected the IDE hard disk with the Windows XP and try to boot my computer only with the Windows 7 and it didn't boot, neither when i reconnected the IDE hard disk. It halts after the post at "booting from CD". I change the device boot order and it didn't worked. I tried to repair several times with the Windows 7 installation DVD and it didn't work. Now I can't use my computer with windows 7. Is there a solution, besides re-installing again Windows 7 ? Help!