Three times now Avast has notified be that I am unprotected. If I bring up the Avast dialog and click ‘resolve’, I think it is, the dialog becomes unresponsive and a bit later windows becomes unresponsive. It appears the windows explorer has crashed (NOT IE). It then test some effort to get the machine to boot again, I have to come in safe mode first, shutdown and come up normally. Some times I have to do that more than once.
It is Avast Free
11.1.2245
def ver.:160128-2
Perform a repair of avast and see if that solves it.
If not, perform a clean installation of avast.
Make sure there are no leftovers from other av’s on the system > http://www.ache.nl (links to removal instructions/tools)