Vista bootup error

Help! I have a 1 yr old Compaq computer with Windows Vista. While trying to boot it goes to the "Blue Screen" which down at the bottom under technical information says, "STOP: 0XOOOOC1F5 00000......" I used the Hardware diagnostics that I made when I first got the computer and after I run it say that all hardware tests pass. I also tried both the system backup disks that I made, and holding down F11 while booting, neither of these would do anything but go to that same "Blue Screen".....Any info or help would be extremely appreciated.