Desktop won't change

I have my desktop picture set to change every hour or so but despite trying various settings it only seems to change every month or two!
I have two monitors driven by a Nvidia Quadro 600. Neither display is changing.

Also, when I first setup the two monitors, the screens aver would alternate the images on the two monitors. i.e. Pjicture A on right then B on left with A still on right, then C on left with B still on right, and so on. Now A appears on right with left blank, then B on left with right blank. Not sure why it changed.

Not a vitally required fix but it would be nice if it behaved as it should! Any thoughts?

Hi Sigurd,

I wondered if you had been through the excellent tutorial that shows the various ways of setting up desktop pictures, including the case for multiple monitors. Check out options 5 and 6 for other ways of setting up.

https://www.tenforums.com/tutorials/4...0-a.html?ltr=D

Thanks but unfortunately I had already been under that particular bonnet of Windows 10! I had already set things as per tutorial but it won't change.
Useful tutorials though.