I submitted a ticket 5 days ago and haven't heard anything since except for a scripted ticket receipt, so I thought I'd try my luck here
Activation fails with ACT.7 "License and product do not match"
Product installed is ESET NOD32 Antivirus
Receipt is for ESET NOD32 Antivirus valid until Apr 2018
It's a Windows 10 machine that worked fine with the product before I wiped the Windows install