I bought doom 3 a while back and installed and played no prb. Then I removed it for reasons im still not entirely sure of . Any way, i decide to play it today so I installed it, and that whent smoothly. When i tried to play it, the game would pop the d3 start screen and it would sit there loading. I finally gave up and quit out; when i went to open mozillaFF and some other programs I got no response. Nothing seemed to work until I restarted. Any ideas on what could cause this problem??? thnx in advance.