When you get a chance please look over it and see if there is anything that pops out at you.  Windows XP Home SP3.  I try not to run things in the background since it is an old machine. AMD Sempron Processor 3200+  2.5 gigs of ram.  Just started the blue screen thing a few days ago so here I am... If you need any more info or want me to run anything else, let me know.