...which takes you to the Microsoft-sponsored Answer Desk and a third-party support tech.
That being said...
- Are you still getting 80246002 errors?
- When (exact date, preferably) did you replace MSE with Avast (Free, I assume)?
- What anti-virus application was installed before you installed MSE, was your subscription still current, and did you uninstall it before you installed MSE?
- Has a(nother) Norton application or a McAfee application EVER been installed on the computer since you bought it?
- Did a Norton free-trial or a McAfee free-trial [PICK ONE] come preinstalled on the computer when you bought it? (Doesn't matter if you never used or Activated it.)