I kept getting this error on the Avast pro version. Originally had the free version that worked great. Then purchased the pro version. Intel P4/ 256mb ram/ windows xp Home/ service pack 2 with all updates. I removed and reinstalled/ did the online repair/ installed new ram/ and finally I unistalled, rebooted, removed all “avast” and “alwil” links in the registry, rebooted and reinstalled Avast pro, rebooted and no more errors.
I failed to mention…there was a bunch of registry links that contained “avast” and started with “Legacy” that will be locked and cannot be removed but I skipped over them.
Legacy driver keys are blocked to delete. This is normal.
Which firewall do you use? Any other security program?