I feel somewhat bad about this, as it constitutes spamming rather, but I thought it would be better to have a thread dedicated to the problem that I (and others) are experiencing that didn't have FIXED in front of it. You may consider said other thread abandoned, by me at least.
Basically, I'm at my wits' end trying to get UT3 to run more than a couple of deathmatch games without crashing to the desktop with a C++ error. Now, things have got a bit better for me - the errors used to be non-descript, just random crashes. Ultron's tweaks and tips from other users here have at least enabled me to load and even, sometimes, play a map. When I can play, the game runs smoothly with maxed-out graphics, sound, everything. I've run hardware checks on my computer (I am currently running a RAM stress test and am on my laptop), and the hardware stands up to scrutiny. Besides which, a C++ error indicates more of a software than a hardware error, surely?
I always run a clean boot for this game, as it's the only way to get it to run at all (before crashing after 5 minutes). Is the culprit here Vista? nVidia? Other games seem to run OK most of the time (had a few problems with Crysis to begin with but they've been ironed out).
Only one last thing to say I suppose - basic specs:
Core 2 Duo E6550 (overclocked to 2.9GHz...which I have tried removing.)
GeForce 8800 GTS (640MB)
XFi Extreme Audio