I Purchased 2 Avast Premier 3 Years Support Licences.
After Updating my 2 computers to 2015 i see never again Updates.
My laptop and desktop pc get NO Updates.
I has watched under Settings Auto Update on
Update intervall get updates all 240 Minutes Nothing, changed to 180 Minutes Nothing.
Internet connection always connected to the Internet
Start update over tray icon, avast download new definitions

Laptop don't turn off connected to internet check definition Version waiting 18 Hours later same definition Version.
This ist with 2 Single PC Licenses on my Desktop PC and my Asus Laptop.
Both computer using Windows 8.1 Professional X64 Build 9600 (Up to Date all Updates installed).
Uninstalling and Re-Install Avast 2015 has Changed nothing.
My Asus Latop is New 1 Week old and my other PC is 4 Years old, looks for me there is a problem in Premier 2015...