Right now I have it set to 10 seconds, so I'll know if it starts working again. Shuffle is checked, but I tried it both ways. 12 of 14 pictures in the folder are selected, which is the way it's always been. I haven't moved or renamed anything affecting that picture folder, and I can manually select any picture in it using the desktop's context menu "Next desktop background" selection. I hoped applying another theme and then going back might help, but no such luck. As with any problem, I tried rebooting first.
The last updates installed were on May 1: KB975496 and KB980408 for Windows 7, and the malicious software tool. Before that was AL1916W for Acer display - now there's a suspect. But that was on April 18 along with 10 Windows and Office updates, and I don't think this has been a problem for that long. However I will uninstall the Acer update and see what happens. I can try a restore back to that time. Luckily, I haven't been tinkering too much since then.
Just checked and the Acer update is not listed in Control Panel\Programs and Features\installed updates. Revo doesn't list it either. Maybe I can roll it back in the device manager. I'll check that.EDIT
: I went to the Acer monitor properties and clicked roll back and rebooted. Nothing changed about the desktop slideshow.
Edited by RknRusty, 07 May 2010 - 07:44 PM.