Since I updated to 1466 I have to manualy turn on the shields at start up. I tried repair,also tried reinstall,same thing.any sugestions on how to fix the problem.
a clean installation from scratch usually fix that problem. but sens you said you already tried that you could have a malware problem that have bypass avast and shut it down.
so i suggest you follow this guide and attach your logs.
http://forum.avast.com/index.php?topic=53253.0
good luck
Have you tried resetting the avast exclusions in comodo?