Hello Kirk et all!
I too am having an issue with PM deactivating on my Surface Pro 3. Last night alone, after reading this thread, I tested a few times and it deactivated 3 out of 5 times I started it up. Whether I was running it as Administrator or not seemed to not have any effect.
Since I am almost running the same software on my SPro 3 that I am on my desktop, including Windows 10 on both I cannot come up with a major difference.
I have noticed that when I go to my studio, I am on a different wifi network and I usually have to reactivate there. This is really the first times I've tested at home as I usually just move the files over to the desktop and work from that. Also, it seems to happen after a Windows update to the OS.
You mentioned that PM looks for a hardware signature. The only thing I can think of on my SP 3 is that I am using BitLocker on it and encrypting the data on the disk. I was wondering if this may be changing the signature PM is looking for.
I'd be willing to assist your support folks and supply any data that may be needed.
To get around not having to go the Camerabits website when this happens, internet access isn't always available, I've copied the registration to a text file and keep it on the hard drive so I can do a copy/paste and continue.
Any thoughts or suggestions?
Tony...
di Sogno Photography