How to Remove Shared Documents Folders From My Computer in Windows
Simply fire up the Registry Editor and navigate to the following key (To
open the Registry Editor simply type 'regedit' on Run window):
HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows \ CurrentVersion \ Explorer \ My Computer \ NameSpace \ DelegateFolders
You'll see a sub-key named {59031a47-3f72-44a7-89c5-5595fe6b30ee}.
If you delete this, all of the Shared Documents folders (which are
normally under the group called "Other Files Stored on This Computer")
will be gone.
You do not need to reboot your system to see the change.