Problem using My Pictures sub-folders as desktop slideshow...

Well, the install went smoothly, thank goodness.

Had to contact Microsoft to get them to re-activate but that wasn't a problem.

Tried the background slideshow and it worked!

So, just in case, I made regular system restore points as I was installing my regularly used software. All was well until I used Tuneup Utilities 2013....

For those that don't know, there is an option to optimize the registry. I do this as a part of my routine when installing this piece of software. Tuneup's optimization stops the background picture slideshow from working! I tried a restore to see if that put the issue right but unfortunately the restore points (I found) do not save the registry, so when I tried to use the slideshow it didn't work.

Luckily I did a system backup after installing my systems drivers and a few updates from Microsoft but nothing else and hey presto, it works again!

Would love to know which registry settings Tuneup changes or removes during optimization though so I can try to avoid this happening again.

Same problem as above, but without the solution. Just happened recently, coincidentally (?) after other reboot problems and reverting to previous restore point. Inconsistent before, now cannot change desktop beyond individual folders. I've tried the Library linking method posted here as well as other various fixes posted elsewhere. I did run a reg cleaner but within Windows (not third party like the poster above), before this problem reached this point. Any more help available?