Ok I recently got a new HD(it was cheap). I have Windows pro on my old one. I put the new HD in the same comp and installed Windows Home on it(pro is kind of corrupt and didnt want to delete my files). So anyone I can't boot into my Windows Pro now... Also in the boot menu it has my old HD as the primary boot but you can load either 1 ...if you load pro it will say something about the hardware. If I change it to boot from the new HD primarly it will go to this firmware thing and start counting up. BTW: I could boot Pro before I installed home.