that's really odd. I don't suppose any other programs have the same symptoms? Also check with Nvidia.com (nowhere else) to find the exact latest driver but most likely that's not the problem. First just make sure shadows are turned completely off in the game cuz Joymax really screwed that up. I'd say most likely is a ram shortage or spyware/viruses. First start the game and get to the lovely opening boat thingy and then minimize the game with windows key + d or alt-tab to the task manager (the ctrl-alt-del thingy) and on the performace tab look for Physical Memory and see if Available is 30000 or more. If it's not, you're low on memory. You can try closing any other unecessary programs to free up as much as possible and see if that helps. If U do have plenty of ram, check to see if the processor usage is constantly at 100% or if it's above like 10% for a good long while while you're just sitting there staring at the desktop with no windowed programs running at all. If so, something on your computer is really inefficient and the programmer should be shot or you have something bad on there. Spybot search and destroy is awesome at getting rid of bad stuff as well as ad-aware SE (both free at download.com) and Avast is the best antivirus invented to date and it's free so ditch yours for that one

Oh and I almost forgot, if you have a filesharing program running ESPECIALLY Limewire, that's using your connection too much and making you lag. Make sure anyhting else that uses the internet heavily isn't running while the game is.