I posted a thread regarding this a while back, I just removed Webrep to be honest, I'm a careful surfer anyway and I'd hardly say that some of those webrep things (avast or otherwise) are always super accurate.
Have you tried repairing avast? That might fix the issue short of needing to do a full reinstall. I do understand your frustration about having to reinstall all over again, as I've needed to/been recommended to reinstall like 4 times since I bought Avast IS last year.