Again...the only time Iv gotten this error...and every time BTW...is when I dont update Vista service packs 1 & 2. If I install the service packs before Avast, no problems. I use an OEM 64 bit Ultimate package(system builders pack). I dont know if this is a problem on the retail version, but I dont know the difference for MS key setttings either.
Can a tech try this by instaling Vista(without service pack 1 or 2), then install Avast to see if they get the same results. I would be happy to 'borrow' you my system builders disc if you dont have one.