I suspect that this folder may well contain hidden system files in which case you would not normally be able to see them and you certain should not move them. To see if I correct, open Windows Explorer and, in the Tools drop down select Folder Options. Select the 'View' tab and then under select . Also, uncheck then . You should now be able to see all the files in this folder.
I would recommend that you then undo what you have just changed (although this is not essential to the running of your system).