Hi Walter,
As they are not connected via a proxy then if you set one it will not allow them access to the internet as it can't find the proxy!!
And to allow just remove the proxy settings.
The Registry keys are:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
ProxyEnable = 0 Not Used 1 Used
ProxyServer = IP Address (Just use a fake IP Address)
Kind Regards, Paul Benn
**** Never Giveup, keep trying, the answer is out there!!! ****