Open Question: WoW help (failed to find a suitable device. exiting program.)?

my hard drive was corrupt and broken so i bought a new one so i dont have any thing besides windows 7 on but i had vista before. my graphics card is ati radeon xpress 1100 256mb and every time i play wow this shows up failed to find a suitable device. exiting program. do i have to install graphics card onto hard drive or what ? thanks,