(PC Support Tips)How to config the proxy for PC system account if you don't know the password
How to change the proxy setting for PC system account if you don't know the password of PC system account?
1 Login the PC machine by using any account
2 open registry HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList\
3 make a loop to get all subkeys, check [ProfileImagePath] and find the name of PC system account in it (key name is always started with a path c:\Users)
4 Go to HKEY_USERS\user ID\Software\Microsoft\Windows\CurrentVersion\Internet Settings. (user ID in the subkey that contains the PC system account).
5 Change the value of ProxyEnable (0=disable, 1=enable) and ProxyServer(proxy:port)