Windows 7 / Vista loses local resources when connected to VPN

Starting with Vista there is a hidden configuration setting called UseRasCredentials.
If this is set to 1 Windows uses the credentials of the VPN connection for all further accesses (this is contrary to the behaviour of XP).
To fix this problem:

• Locate the .pbk file that contains the entry that you dial. You can find this file in location C:\Users\Username\AppData\Roaming\Microsoft\Network\Connections\Pbk
• Open the file in Notepad.
• Locate the following entry: UseRasCredentials=1
• Modify the entry to the following: UseRasCredentials=0
• On the File menu, click Save, and the click Exit.