Xmen origins wolverine runs slow on my PC even if i meet all system requirements. WHY?

If you're using Windows 7 it's most likely your RAM count. You'll want a minimum of 4gig for Win7 if you want to do anything besides look at Icons. You could also adjust some graphic settings, kick down the resolution, or adjust the anti-aliasing. Also having SHADOWS on will pretty much double what the GPU has to process, disabling them will be a very big improvement.