Sorry Eddy,
It has nothing to do with Windows 8.1 I just updated 6 computers all running Windows 8.1 to avast! 2014
without any problems. :slight_smile:

@jmmug,
Glad you solved your problem and happy that the Third Party Support didn’t get you money. :slight_smile:
If you have a problem, please ask it here. There are many of us who would gladly help without charging for that service. :slight_smile: