Thanks to everyone who answered. I have figured out another way.
Go to control panel- Internet options-Connections- LAN settings
Click - Use a proxy server
Enter any random ip address in address...

Thanks, there is no USB port on the printer. Can I connect all computers by network cable and printer to a network switch, that is not connected to internet

I have 3 computers that are connected to internet and are also connected to network printer. I have another computer that has financial data. In order to prevent any copying, I want to turnoff...