system
21
We have the same problem and have 60 licenses that expire in January 2017. >:(
https://www.avast.com/faq.php?article=AVKB231#idt_500
"Can I use Avast Endpoint Security with Windows 10?
The Avast Endpoint Protection products are being updated for Windows 10 compatibility and should be available in Autumn 2015. We recommend that customers who require Avast Endpoint Security delay upgrading to Windows 10 until the compatible version of the product is available."