Windows Explorer Redirection DLLS

I have not seen this discussed here before…

The computer may be infected by simply copying virus file to the Window folder without making changes in the system settings (registry or configuration files) or changing the Windows system files. A Trojan software need to get the write right in the Windows folder. But usually it's not a problem. Power users and administrators have full rights to the Windows folder. Windows File Protection does not help you.
Anyone have a test for this vulnerability?