Bee -

In this case I can be quite certain the laptop was not accessed by anyone, as it was safely sequestered in our camper for the whole time. All the menus are accessible, and all settings are - so far as I can tell - exactly as they were when the screen saver worked. All the security settings are in good order, having been checked out several times recently.

As already mentioned, I've found several dozen users with similar complaints on the internet, with well-meaning advice from the SPGWKs that doesn't work for those who posted the problem any better than it works for me. There may well be multiple things that could cause the screen saver to fail to run, but none of the obvious (or any arcane ones that I've found) seem to recover mine.

As I won't actually need the laptop again until next August, for WVA, it's not a high priority problem. I'll probably just do without my pretty pictures for now. (And I have the same screen saver on my desktop, so I'm not really missing them.)

John