This is my laptop with XP Home on it. The only thing that I can think of is the other night I ran defrag and AVG scanned the HDD, and since then explorer will not run correctly. It will start if I call it, crash, start again, then crash and stay down. As odd as this is, the other thing is that the other user profile (my wife's) runs fine - no problems with explorer. This windows install is several years old, but format/reinstalling is out of the question. Any ideas?