Page Fault In Unpaged Area, Blue Screen After Startup Dell Inspiron 6400

Dell Inspiron 6400, Windows XP I can usually fix simple problems, so many people ask me to help them with simple problems. My mother had what i thought to be a simple problem that now appears to be a fatal problem. My mom ran Lavasoft Ad-Aware because the computer seemed to be running slower then normal, also receiving many more pop-ups then normal. Ad-Aware was detecting around 50 infections, the infections kept returning even after Ad-Aware 'fixed' them. many pop-ups and slow performance. I did the same thing, ran Ad-Aware, and recognized that the majority of infections cam from the same root files; rustock, vxgame and spyware.trojan. Ad-Aware could not remove them so i downloaded Spybot, Spybot did the same thing, recognized them but after restart the problems and the infections were still there.