By default, Windows 7 doesn’t install the Telnet client. The client is for text-based communication with remote systems. You can install it by following these steps:

- Click Start >> Control Panel


- Double click Programs and Features
- Click Turn Windows features on or off

- Tick the Telnet Client checkbox (See pic below)


- Click OK

A box will appear showing the installation process. When it finishes running, the client is installed.