Run any enough good registry cleaner (for example CCleaner => Registry) and restart computer or at least explorer.exe and it is gone. If You want to do it manually, go to reg key Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ControlPanel\NameSpace\ and delete under NameSpace this item {8DE189EC-C9C8-4D31-9F18-E0B7407019A9} and then do the same - restart pc or at least restart explorer.exe and it is gone.