Close the apps on your desktop, then proceed:
Download and save Cleandesktop to your computer from this link: http://www.thespykiller.co.uk/downloads/cleandesktop.exe and double click on the cleandesktop.exe
It will automatically extract to c:\desktopclean where it needs to be to run and will automatically run the cleandesktop.vbs script
If it doesn't open then go to c:\desktopclean and right click on the cleandesktop.vbs (Run as Admin)
If you have script blocking enabled you will get a warning about a malicious script wanting to run. Allow this script to run. It is not malicious.
If you get a message when you first run it "Can not find script file *.*" just double click the cleandesktop.vbs script again.
It will then kill Explorer. You will lose your taskbar and desktop. It will repair the registry entries returning your normal desktop and context menu functions.
It will restart Explorer.