To prevent Windows XP (and later) from re-creating the My .... sub-folders of My Documents:
1. Open a CMD.EXE Window.
2. Type regsvr32 /u mydocs.dll and press Enter.
3. Press OK when you receive the DllUnregisterServer in mydocs.dll succeeded dialog.
4. Delete the My ... sub-folders that you do not want.
NOTE: If you need the My Documents functions that un-registering this library disables, type regsvr32 mydocs.dll in a CMD.EXE Window.