Better yet PG
, if you could...give us your spec's on your computer. Such as:
CPU speed (how many Ghz), System Memory (how much ram do you have?), Operating System ( Win XP or Vista), and most important of all - Video Card (what brand?...Nvidia GeForce, Ati Radeon, Ati Rage, etc. and the spec's for the Video card as well.
If you can post that info, it would go a long way in us helping you to maybe diagnose the problem.