Without a great deal more information, there is no way to be certain that any particular report of a graphics problem fits into any particular category or class. We don't know what trouble shooting you have attempted, and we don't even know yet, whether you made absolutely certain your system was good enough for the real, practical system requirements, which are much different from the Pie in the Sky exaggeration published officially.
Please fill it all in.
Basic Hardware Specification Chart (Empty so far)
Processor Manufacturer: AMD / Intel
Processor Name / Type: Athlon X2 / Pentium D / C2D / dual core / quad, etc.
Processor Speed: ?.? Ghz
Operating System / Service Pack: WindowsXP with SP #?, Win7, Vista ?
System RAM: ? ? GBs (MBs, if less than 1024 ? )
Video (GPU) Manufacturer: ATI / Nvidia (
only those two are supported, PERIOD, so please answer which of them you have)
Video
Card Model: (examples) Radeon HD 6670 / Geforce GTS 450
Video
Card Driver Version: Catalyst ?.? / Nforce ??.??
. . (please use the numbers, and dates, *not* the word "latest")
Video display's default screen resolution
Video
Card onboard RAM: ? ? ? MBs
Sound Card Manufacturer:
Sound Card Driver IDs:
Sound Card Model:
(And this is only for the raw hardware & driver variations. Potential software conflicts are far more likely to be game play problems, and developers cannot test for all possible program loads.)