fnukyguy,
I haven't had any BSOD ever because of avast!. I'm using all avast! shields except Outlook, I don't have Outlook on my computer.
Look in my sig., I'm using XP SP3 with avast! Beta 4.8.1218. My browser is Opera 9.51.
Maxthon is a IE clone, I don't recommend using IE or any clones of IE. I recommend Opera. Even Firefox is a better choice than IE. Once again, look at my sig.