I was getting explorer errors (must close, send report?, here's a link, must be your addons) - started right after one of the MS updates - the one right after the WB release - went from errors every once in a while to every 15-20 minutes or whenever I opened a folder or something - got most of my docs and such copied to disk - was in the process of copying my downloaded skins & my mouse double clicked and tried to apply about 60 WB skins at once and that's all she wrote. after the crash I had no icons, no start or bar, no mouse. Nothing worked. had to do a destructive recovery (reformat) - I still think it was an addon - just don't know which - I had Norton at one time - it had an addon and Norton is damn near impossible to remove - hp has addons - ELink has addons - WebBlinds (which I refuse to suspect), Adobe, Qtime, etc. If you open addons you'll see load of them.
The addon message from MS was never specific - I'm suspecting ELink but it's my ISP (don't get much choice in the country and MSN bites (their browser conflicts with DTX and objects - get bleed through).
If the messages start picking up, I suggest you start backing stuff up. After the reformat I installed all XP updates prior to reinstalling other stuff - so far The only messages I get now is when I shut down, task mgr has to close taskpanel (Elink) prior to shut down.