I have been using free Avast for a few years now. But after I have restore my CPU (Vista), like I do once a while, I suddenly start to get the error : 0xC004D401. I thaught it was the spybot antispyware. But after uninstalled the software, the error kept poping up still. Never had this problem before. Seems that the new Avast version is conflicting.
Anyway, this morning I have update with avast 6.0.1203. I will see how it goes. Otherwize I might just switch with an other anti-virus.