This is not possible in Windows-7, XP explorer dont work on Win-7. But you can use the alternative file manager, like the Quad-Explorer Q-Dir was feeling
Open User Account Control Settings in Windows, the Solution is foralso Windows 10, 8.1, and Seven
Image-1 Library Properties on Windows-7 To include or remove folders from librarys in Windows 7 please start the MS-Explorer with keys [Win-Logo]+[E].
If the Windows 7 online activation is not possible, you can activate Windows 7 via phone system To use the licensed version of the operating system without