Reply to Random Crashes - Help?

Ok so I've had the VCI-100 SE for about 2 months now, and I am enjoying it immensly. I also bought Traktor 1.2.4, and Audio 2DJ, and got a fresh new HP Pavillion dv7t Core i5 laptop, with an official Windows 7 64bit running on it, optimized for music making and playing, which should all be very well capable of dealing with all of this.

AND YET..

Once in a while, Traktor crashes. I believe I use my setup (at gigs and at home) just about 15hrs a week, and once every two weeks or so, it just crahes. When it crashes what happens is I get this horrrrrrible "NIIIIIIIIIIII" or "ZIIIIIIIIII" sound, something like what the Slice effect does, but louder, and constant. The only thing to do then is close Trakotr (and it won't close cause it's stuck) And then restart the computer.
This happens quite randonly. It is always triggered by me touching something on the controller, usually when i'm pushing it to the limit (say one deck is looping, and filtered, and in the other one i'm using the slicer, or fader fx) but not necessarily. It can also happen when one track is playing and i'm just using the jog wheel on the other track to cue it up.

This is not good.
It has already happened twice in bars I was playing in. And once it happens at a club I will be very very bummed.

Has anyone experience this before? Any soloutions you can believe of?
I've already taken the latency quite up to 12ms, as lower latency gave me some click sounds here and there. Can I take it any higher? I just changed it to 32ms (!!) which actually sounds and feels okay, but I understand that's too high? Will that even solve the problem?

Help?

Sorry for the long post..

Thanks so much!