screensvaer reset part II

Based on feedback I will modify the info in my previous request.
There are no policy issues involved. I am the network Admin. Nothing else seems to change, just a random resetting of my screensaver to a choice of none. My machine stays on most of the time, but rebooting does not appear to cause the reset to occur.
I typically lockdown the desktop before leaving the room because I lack confidence int he screensaver kicking in. It is set for a 3min wait before activating.
Any Ideas or questions to help me eliminate possible causes?