Thanks for information .

Yea... I feel somewhat uneasy about removing software that was installed by default. Thems big and clever guys, I presume, know better what to include into the default installation. Perhaps for the good reasons I haven't yet even come to understand, but which are nevertheless of utmost importance.
And thankfully there comes this easy solution to just disable this now unneeded piece of software.

Changing backgrounds automatically... I used to enjoy it for quite some time, but then got tired of this feature. As I'm inclined to hide from reality in my computer, these beautifying features make it even worse. So in my case it must be: the simpler the better.
After all, hiding from reality will be much healthier somewhere in the garden or out in the park, where your body can rest and get filled with natural things, it's soothig with no ill effects.

OK, that's me. Others, I hope, have more control of themselves when dealing with their computers.