I've just swapped out my old Ultra-D/Opty for the IP35 Pro + C2D and everytime i shutdown windows the board powers itself back up again 
I've spent a while playing with various BIOS (version it shipped with) and windows (fresh XP install) settings to no avail.
All wake up by and resume by settings are disabled in the BIOS
any ideas ?
rest of system:
2GB Ballistix
EVGA 8800GTX
OCZ 620 PSU
just one HDD atm 74G Raptor

I've spent a while playing with various BIOS (version it shipped with) and windows (fresh XP install) settings to no avail.
All wake up by and resume by settings are disabled in the BIOS
any ideas ?
rest of system:
2GB Ballistix
EVGA 8800GTX
OCZ 620 PSU
just one HDD atm 74G Raptor