Right-click empty space on desktop, select NVIDIA Control Panel, then Manage 3D Settings, then (on the right) set "Maximum pre-rendered frames" to 1 and hit Apply.
The control panel will also tell you the video driver version you have (at the bottom, hit System Information, then look at ForceWare Version in the Display tab). If it's less than 175.19, you'd do well to upgrade (download and install from nVidia site). If it's higher than that, it's probably an unstable/debug/beta release and you'd do well to downgrade.
BTW if NVIDIA control panel is missing (you do not see that option on the desktop right-click menu), it's probably a default Windows driver for the video board and you definitely need to upgrade.
Then short of trying different driver versions in the hopes of finding one that works, I'm out of ideas. And I can't even be sure the crash is related to that. Can't help you if I can't reproduce the problem, and I can't (though I've been playing with 175.19 drivers, at different points in time, on both GeForce FX 5700 Ultra and GeForce 7950 GT).
The only things I can think of would be tweaking BIOS settings like AGP Fast Writes, AGP Side Band Addressing, AGP Rate, AGP Aperture Size... or installing RivaTuner to tweak these (and more) at the driver level to try and achieve stability. But if you're not familiar with these settings, at this point you'd probably be investing more time in this old computer than you'd want to.
Last edited by Pa3PyX; 05-05-2012 at 11:48 PM.