[Windows 7] Network Adapter Priority in Windows 7

How to Change the priority as 1. LAN, 2. Wireless, 3. USB to LAN

I have try to:

1. Edit metric value of each network adapter. (LAN=1, Wireless=100, USB to LAN=999)

2. In Advanced Settings of Network Connections, I put LAN on the top, then Wireless, then USB to LAN.

3.delete the static route.

4.check with HOST file in etc folder, put # in front of all row.

5.Check registry key : HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip \Parameters\PersistentRoutes, delete all entry.

***This is a corporate computer
***Is it possible that effected by group polices?