I have already followed this exact procedure at least twice--once with 5.0.418 and once with 5.0.462--same result. It should be noted that after reloading XP, all MS updates and the same programs I had previously, with the exception of Avast 4.8, the rig acted just the same when I tried to load 5.0.418 the first time. Before reloading the whole tamale, the problem was identical after the initial loading of 5.0.418--Avast asked did I want to restart, I said OK, and it was never right again. If this is not an Avast problem, it might be a compatibility issue with some setups of XP--I do not know. I do believe, however, after all the repeated attempts I have made, including this exact procedure, that there is a problem not related to my individual computer or my techniques, but I could well be wrong. If noone else has duplicated this malady, I will just have to wait and be satisfied with 4.8, which has served me well. It's just that 5.0 looks cleaner and quicker--I don't know for a fact that it is any better....Tryinhard