OK, rather often when I am watching a video or something similar, my computer decides to freeze up on me and I loose control of the mouse.
Actually, the above problem can happen at anytime as I've realized shortly after posting the first time.

I don't know if I need to configure the X Windowing System some more or what.

Maybe related is the fact that when I use Xine to play videos I end up with a lot of dropped frames. If I use Kaboodle or Noatun I do not have the dropped frames.

I just recently installed Slackware 10.1 so it'd be no problem to re-install it if anyone thinks that would be the proper course of action to take.

Another unrelated problem that I have is bash not recognizing many commands such as
SuperProbe, xf86config, etc.

All help is appreciated.

this usually happens when you have a broken RAM-module, remove (or replace it). Could be something else, but broken RAM certainly does this.
check http://www.memtest86.com/ to test your RAM.

grtz,
elluva