I tried to install Windows 7 on the second hard drive on a Dell Dimension 8400 computer. The primary HD is a SATA drive with Windows XP Professional. The second HD is an IDE drive running through a Promise Ultra66 PCI card.
The installation started OK with the setup asking for the driver
for the Ultra66 card. At the first automatic restart, I got a message saying that setup could not find the partition to load Windows 7. When I clicked OK, it began a rollback process. Apparently the rollback was not successful since on boot up it asks if I want to go to a previous version of Windows (XP on the primary drive) or rollback the Windows 7 installation.
If I select previous version it successfully boots into Windows XP. If I select rollback it says there is an error and I should try to repair with the ISO installation disk. I tried the repair but it had no effect.
I would like to get rid of the boot options and return to just running Windows XP. How can I change the boot files to make this happen?
Found Solution: I used EasyBCD to reconfigure Windows 7 bootloader.