change proxy
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"NoNetAutodial"=dword:00000000
"ProxyEnable"=dword:00000001
"ProxyServer"="192.168.1.1:3128"
"ProxyOverride"="<local>"
 
locked proxy
HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Control Panel
 
ditials