Why is my game lagging so terribly?

[Echo]

I haven't managed to get four minutes into the game before my fps drops from 60 or so to 3. It'll run just fine at first, but about the time I get to the part where you're supposed to drop something heavy on the grate to get out of the bank, it just dies. My computer meets the requirements listed on the store page, and I've set graphics to the lowest setting. I've also tried restarting my computer and scanning for any viruses (none showed up).

Is there anything else I could try, and would it have anything to do with the fact that it's 32-bit and my computer is 64-bit?

[Paullo]

Shouldn't be a 64-bit thing, I'm running Windows 7 64-bit and I'm not having any trouble. Sounds like another compatability bug - you might have to hang out for a patch.

[Shadow of Avalar]

I'm also running 64x win-7, and I run it fine with no problems. You should try turning down the video settings in game.

[Echo]

Like I said, I've got the video settings as low as I can, so that's not the problem

[SecondBestOne]

I'm having no problems apart from V-sync being a bit dodgy.