I recently purchased Grand Theft Auto 4 and the game lags a bit when I am playing or when a lot is going on. My computer should be handling this with ease at the maximum settings. (which it is not at).

My computer specs are:

Dell studio xps intel core i7 2.8 ghz
Windows 7
8 gigs ram
1 TB of memory
video card: 1gig ATI Radeon HD 5700 series.

Any idea what I can do or change to make this lag stop? There is no reason why this should be happening. I have read a lot of people don't like this game. Wasn't it transferred poorly to the PC?
Thanks!

From your specs I assume you are running Win7 64 bit edition, I would hope so.
Have you tried running the game in compatibility mode to a 32 bit OS ?

Yes, I am running win7 4 bit edition.
I haven't tried running it like that but I will give it a shot.
I read a bit online and a lot of threads say that it was poorly designed. But I will try your idea. Thank you