Directx 9.0c Install issues.

[Xeoneex]

Ok, my friend is having issues with his Directx. He has a Compaq Presario, he got from a Sams Club. Had Window's XP Home preinstalled. He has Directx 9.0b and well he tries to install Directx 9.0c for World of Warcraft and for some reason it won't install becuase it doesn't pass the Logo Test. Says it is not certified and cannot be installed. Is there anything that can be done or? And sadly the system did not come with a Restore disk, or a Windows XP Home disk so reformatting isn't an option at the moment. Is there anything we can do so we can get it up and running now or does he have to wait to buy Windows XP disk and reformat?