Windows 10, AU edition, 8GB RAM. I have created a slideshow using ACDSee Pro and set that on the computer as background, changing the pictures every 1 minute (the smallest available time, although Win7 offers every 30 seconds). Instead of "Fill" I set it to "Center" which slightly reduces the sizes of the pictures but shows the embedded comments I had added to the pictures clearly.

Every time I reboot the computer, the slideshow resets to "Fill" with one of the pictures and I have to right click the desktop, click on "Customize", select all the pictures (they are all in one folder) and again click on "Center". It just doesn't save the setting, yet on another computer (also Win10 AU) it does. Incidentally there is no "Save" button to save your changes (there is on Win7).

It's no big deal but it is a pain, doing it after every reboot. Any ideas why it keeps doing this? (Everything up-to-date, Avast and SAS checking things daily)