We see cases irregularly where the DVD or Repair CD needs to be in the drive for the PC to boot. It appears the PC is booting off the disk since it cannot boot without it. The fix so far has been to confirm the System Reserved partition (preferred) or Windows 7 partition is marked Active then run Startup Repair up to 3 separate times with reboots to correctly write the System boot files to it. Partition - Mark as Active Startup Repair - Run 3 Separate Times
Likely the System boot files were either not written or corrupted, perhaps because installer failed to mark it Active or it's Active flag slipped. As SIW2 would often remind us early on, the target partition MUST be marked Active for System Boot files to be written to it.
This is the first time I've seen a BSOD associated with this, so perhaps minidump analysis should come first.
If the analysis or the known fix for disk-only booting doesn't help, then I'd wipe the HD to clean reinstall following these steps to get a perfect baseline install then see if problems recur which would point to hardware issues: Perfect Reinstall