Reply to Traktor keeps crashing and I have an important gig coming up :(

Hey all. I use an audio 10 with 2.5 on 4gig ram vista machine. A few months back I wiped the hard drive and upgraded from traktor pro 1. I set the display settings to performance and system to run in background, as well as deactivating wifi. If I have a track playing and drop in a new track, the cpu overloads from scanning the track and traktor freezes or the whole computer just shuts down.

Last weekend I was playing at a friends party and after loading an unscanned track, my computer froze and I had to restart it. When I opened traktor, all my folders were now red with X's through them and the tracks were missing. I backed traktor up a few weeks ago, so I imagine they should still be in a file somewhere.

A friend and I are trying to create an electronic music scene in our area and on the 27th we are renting out the local community center and have hired a pro sound guy to bring a stack of speakers so we can blast these kids with bass. Only problem is my friend will be running his outputs into deck c and our mic into deck d and I am worried that strain of running four decks will kill my computer and cause a long period of silence.

Anyone have any ideas on what I need to do to keep things running smoothly and get my folders back?