I had a weird issue today where we could drag drop stuff from places like Outlook, Explorer, Internet Explorer, to other Explorer windows. But you could not drag them to the desktop. It would give you a circle with a line saying no, you can't do that. You couldn't even move the icons around on the desktop. The fix.

  1. Start a command prompt
  2. Start up regedit
  3. Start up task manager
  4. Kill all explorer.exe processes
  5. In regedit, goto hkey_current_user\software\microsoft\internet explorer\desktop\components
  6. Change DeskHtmlVersion to 0.
  7. In command prompt, type in explorer so it starts up the desktop again and you should be good to go.