Unlike the previous windows, Windows XP and Windows Vista, Telnet in Windows 7 By default is not activated.
Here are the steps to enable Telnet in Windows 7
1. Click Start
2. Click Control Panel
3. Select View By : Large icons or small icons ( at the up right of the page )
4. Select Programs And Features
5. Click Turn Windows features on or off ( at the up left of the page )
6. Give a checklist at Telnet Client
7. Click OK.