For Windows 7 & below

Proxy settings are taken automatically from the Internet Explorer settings. They are specified via "Internet Explorer" → "Tools" → "Internet Options" → "Connections" tab.

For Windows 8 and above

• Open Windows Settings (bottom right edge of the system tray).

• Click Network & Internet.
  The list of network- and Internet-related settings appears.

• Click Proxy.
  The list of available proxy settings appears.