It was a STOP 0x000000F4
Now my PC rebooted fine and all is well there but my laptop would not boot
After running seatools i have found its now full of bad sectors.
Seatools is repairing the drive as i type but..
It dose a short test, fails, dose a long test, finds 100 errors stops, repairs the errors then passes a short test of those repaired sectors.
Then i do a short teat again and it fails. and i repeat the process and each time it gets further though the drive with out errors untill it finds more.
Im going to keep going but think ill RMA it.
But how can a BSOD cause this?