I had a similar problem 2 days ago. IBM 346, Windows Server 2003 Std, Veritas Backup Exec 10.
For some reason the mirrored hard drives lost their partition so we had to recover from our last good full backup. After reloading the OS and the Veritas backup agent we restored the machine from the last good full backup. I then rebooted the server and saw the error you are talking about. The server got stuck in a loop where it kept restarting and blue screening at the same point.
I followed some advice in this thread where the person suggested trying a Windows repair using the Windows 2003 CD. The first time I did it the machine still blue screened but, it had a different error code. Just for the heck of it I ran the repair again over the first repair and it worked.
