Originally Posted by Zak33
Zak is indeed correct, most system builders now do this to stop piracy, Dell, Advent, all them guys.
You know when you right click on my computer it comes up the manufacurers logo ? Well, they embedd some info in the mobo and on the OEM Windows Disks theres a verification check and if they dont match, they dont work, but it depends on the company.
I know Dell doesn't work, and a couple of other big companies, cos I've tried my OEM Dell disk on my normal mobo when I upgraded.