As essexboy lives in England, might be a bit before he is back online. (Different time-zone) You should do the proposed solution, that of repairing Avast! as essexboy requests, before going on to uninstall, aswclear, etc.,. That way he knows exactly where you are with your system, and no further changes need to be looked for. Makes the repair work a little bit easier for both of you.
Please be patient, you are under his expert care.