I have a laptop that will not boot. 
Sony Laptop windows XP media center edition.
It blue screens with:

Technical information:
STOP: 0x0000007E (0xC0000005,0x000040D8,0xF79E5548,0xF79E5244)

No listing as to which driver caused the BSOD.

I have run spinrite level 2 on the drive no errors.
I have run chkdsk /P from the recovery console twice.
The first time chkdsk did find errors.
All boot options on the boot screen fail.
(Safe mode and last know good config fail)

The last driver on the screen before BSOD is mup.sys.

What is the next step to trouble shoot the problem?