DavidR
11
What that doesn’t do is explain why it works on some XP SP3 system, such as mine, the same XP Pro SP3 OS as yours. There must be hundreds if not thousands of different system configurations that avast is running on XP SP3 systems. As you though this might be too simplistic, a simple code search is unlikely to identify why there is a problem on some and not all XP SP3 systems.
You could help by running the Avast Support Tool as in the FAQ in Reply #1, that however, might be somewhat difficult if you have removed avast and or it gave a BSOD every time. That said the BSOD should have created dump files, both mini and full dump files, hese might help as that is something that the support tool would be looking for.