Avast Internet keeps shutting down!

This doesn’t seem logical to me, but it has happened 5 or six times recently. Whenever Avast sends me an update, I get the dreaded “You are Not protected” icon. I know how to fix this, but it takes more time than I have to expend, and it seems like it’s an Avast problem. Any help will be appreciated.

A good start in getting help is providing details.

What OS/SP ?
What exact version of avast ?
Any other security (related) software installed ? (or was there)
Already performed a repair of avast ?
Already performed a clean installation of the latest avast version ?
etc.