Picturefolder standard icon upside down

Something odd appeared.
Opening the map pictures some submap icons display upside down.
Or the icons displayed the wrong basic Icon, also upside down.
If I resort it with detail and back, pictograms turn out normal.

The personal pictures itself are correct in position and view.

To indicate this, see this snapshot of some of them.


If I use a program like Faststone image viewer everything looks allright.

Opening a picturefolder with windows however I see for example this:



But it doesn't open, as it should do, like this.
Only after changing the reviewoptions it turns normal (list or detail, pictogram etc)



Could it be that a vital file have been lost? like:


Can't find that two in the mainpictures folder, not even when I display the hidden files.

Is there a way to restore this two hidden files?

Or may it be something else?

Yesterday some nasty program like Simplefiles disrupted something. (Beware of Simplefiles)!
In an attempt to get rid of that viruslike behaving progam, I did some cleaning and got it all working I thought.
It is also possible that because of the option display hidden files, by deleting a picture, accidently removed also fssort.ini and Thumbs.db

I restored with a backup, problems solved, so windows must have been damaged by that nasty Simplefiles program.