The same happen in the latest free avast, i have to uninstall and replace it with another antivirus. Thanks a lot was not my main computer.
The step to resolve it do nogthing in my case, perhaps work for you.
Search the avast services and test if they make an automatic start and are working.
Enable the remote services(TermService) to automatic, start it, restart the computer.
Make a complete unistall of avast and reinstall it.