1. Login to Windows
Login to your windows 10 computer.
2. Open up Control Panel
Open up control panel by clicking the start button and typing in control and then pressing enter.
3. Select Programs and Features
In control panel, click on programs and features.
4. Enable a Feature
In this window, click on "Turn Windows features on or off" and then scroll down and enable Telnet by selecting the checkbox and then completing the installation when you click Save.