ok, here's what I did:
1) created a new account, admin privileges.
2) MSCONFIG - turned off all non MS services and all startup itens
3) rebooted. did not change.
4) uninstalled Fences 5 (w/ purge) and installed Fences 4 (I have the license)
5) rebooted - nothing happened, same problem
6) uninstalled some app, including malwarebytes (the only one that can go deep in OS protection)
6) tested Fences 4 - nothing happened
7) uninstalled Fences 4 and installed Fences 5 beta - nothing happened.
the last resort would be a full windows install again, which I won't do. The only other SW that I imagine could conflict would be nvidia, but it's just a guess (and won't uninstall it either).
registry keys - got in there and there's no key for a specific fence, just standard app info stored. any other place?
