I just worked on my computer... wanted to "./configure" a wine-programm into the homefolder. (For some reason)
My background is normally a picture from Claude Monet.
As I was working, I suddenly noticed that the background changed into a naked woman


Sorry, but this is no joke! And I am actually fine with that, if I would not give presentations (projecting onto the wall) with this computer!!!!
What if it happens during a presentation? How embarrassing would it be?
With every OS I noticed that if you load a photo with a picture-viewer and you close this picture-viewer, the photo is still load in the RAM. And for some reason sometimes, (I think often when I turned the computer off), the photo, that was loaded in the picture viewer, was shown maybe for half a second or something. I never experienced an OS not having this problem. However, that's OK, 'cause I will not load naked-woman-pictures before a presentation. But today I did not change my background once, nor did I load that picture that itself was loaded into the background.
Having Linux Mint 17.3, there is this background menu, where you can add your private folders. Ofcourse, I now have culled every suspicous picture into another folder now, which is not loaded into the background-folder option. So I hope, these pictures not being connected with the backgroundmenu anymore, they wwill not be loaded without my permission.
Can this actually help?
But how did this happen, and how can I prevent that? Can anyone else report about this? I dont wanna have ridiculous presentations, you know!

Perhaps it really was this configure-script of wine... but why? would someone do this on purpose? Maybe it was a fun-virus of a friend of mine, but, one week ago, he was just 5 minutes on my computer... is it possible to do these fun-things so fast?
It's of course my fault having this photos; but I ignored many bugs because, even if there are 10000000 Things that are still buggy, it's still 1000000000000 times better than windows. (my opinion... someday computers will work like I want them to, but todays problem represents really what I think about them: They joke around with you

So if anyone can help me preventing this problem, please do so!
I am thinking about (but I have no clue if possible), to make it only for the root possible to change backgrounds... or something like that, anything would be fine,
thank you very much!
enjoy your day,
Apache