Cannot create a folder as Windows says it already exists

1) In May I created a folder on my mothers computer called "2016 Pics." When I visited her this past week the folder and it's contents were missing. I did file/folder search for the folder with no luck. each time I try to make a new folder with this same name Windows says the folder already exists. I tried in safe-mode and via a cmd prompt, all with no luck. There is no "hide folders" software on the computer so I am at a complete loss on this. It's a Win 10 Home system.

2) I also want to disable the Drag & Drop feature as my mother seems to drag & drop folders or files into the wrong folders far too often. I'd rather she use edit>copy, edit>paste. Any help on this issue would also be helpful.

Thanks

@ dalchina,
Thanks for the tips on "Drag-n-Drop" I think I did web search and came up with at least one of these sites. And at quick glance they were not offering a simple reg tweak to completely disable the feature so I passed it by. Still have not read them through. My Bad on this issue as I ended up placing an unnecessary burden on you all to find something for me.

With respect to the "mysteriously hidden folder," I am no longer at my mother home, so it will be a bit more difficult to perform your suggested action. I do have TeamViewer on her system and can remotely control it in order to perform Slartybart's suggestion, but since your suggestion requires booting to a disc or USB It will not be possible until I get on her computer again.

I will be replying with respect to Slartybart's suggestion soon, but until I can find a simple boot method with easy access to a cmd prompt I will have a difficult time walking my 79yr old mother through the steps of creating the boot media and using it.

Thanks for the suggestions thus far.

Brian

Slartybart said:

Ah, had to read your post a few time - thought you could not access the folder at first, but I think you are right - the space is causing you difficulty

In Command prompt, you have to add quotes around anything that has a space in it or else the interpreter stops at the space.

As an example

cd C:\Users\Dad\Pictures\2016 Pics stops processing at C:\Users\Dad\Pictures\2016
so
cd "C:\Users\Dad\Pictures\2016 Pics" gets you to the folder

Once you know the path of the folder, you could also navigate there in File Explorer

Please post the full path of the 2016 Pics folder
or post a screen shot of the dir command you used to find it.

If there is a reparse point, it would be identified like this
08/02/16 12:46 <JUNCTION>

The path of the folder is E:\My Pictures\2016 Pics
after opening E:\ in a cmd window I use the dir command you gave me (dir /a /s /o:g *Pics)
Inside the folder were two other folders which were both empty
I tried to delete it, but did not know the correct syntax to do so
I assume that the following should work: rd "2016 Pics" or delete "2016 Pics"
It is odd that it is visible in the cmd window but not in the File Explorer.

The system used to be Windows 7 and I had setup the users folder to the "E" drive to keep it off "C" It's a completely different HD.
Navigation to E:\My Pictures in File Explorer is possible, but like I said, this particular folder is not visible. 2013 Pics, 2014 Pics, 2015 Pics folders are visible.

I cannot give you a screen capture tonight. I was on my mothers computer via TeamViewer earlier. I will try to do this tomorrow.