Intel Onboard Graphics And New Radeon 9250

I have a compaq presario with onboard graphics and I installed a rad 9250-I disabled the onboard plugged the monitor into the new one and everything worked fine until I turned it off and restarted and it recognized the old board again. the computer froze. I had to pull the new card and plug the monitor into the old slot. I've already put it into bios PCI so by all rights it shouldn't recognize the old board. Can I turn automatic hardware detection off? Or any other suggestions?

I figured it out for myself,

1) Click start --> click Run
2) Type services.msc --> click ok
3) Select shell hardware detection --> right click --> select
properties
4) Choose disabled in the startup type --> click apply and ok.

It worked and everything is ok now, but thanks for being here!!!!