How to hide thumbnails of all pictures in the current folder

Windows Explorer has a feature called thumbnail view, which shows you thumbnails of all pictures in the
current folder. Some people love it, others hate it. If you have pictures that you’d rather everyone around you not see, even by accident, you probably hate the thumbnail view. If so, instead of cursing at it under your breath, just get rid of it for good!
Start the Registry Editor, navigate to
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\
and change the value of the Classic ViewState key to “1”.