I run a Windows 8.1 Hyper-V guest VM for my demos with our VAR kit installed. I've never had problems until demoing at a new prospect. Two demos in a row have started with me waking my laptop from sleep to discover that the license was invalid, requiring a very awkward 5 minute pause while I manually reactivated my VAR kit.
The first time I thought it was Windows updates in the VM that did it but after it never recurred and I disabled automatic updates I thought I had it. Other demos and training sessions went fine. I worked day in and day out for weeks on my laptop with reboots and so on with no problem. Then I went and did a second demo with the same customer and had exactly the same result. I had carefully tested hibernating the VM because I didn't want the same thing to occur. My tests in the morning went perfectly but when I arrived at the customer the exact same deactivation happened. I wasn't even connected to their network, only plugged VGA output into their flat panel.
I always thought the HWFP is based on the base system components and the NIC.. I have the NIC MAC set to static so it's not the MAC that's changing. Ideas?