Windows 7 does not offer the Telnet command by default. If you want to be able to Telnet to other servers using a Windows Seven machine, you need to enable the Telnet client. This step by step article shows you how to enable the Telnet Client in Windows Seven. You might need administrative access on the machine for enabling this. You also have the option to do a "Run-As" command and run the following procedure as an administrator while logged on as a non-privileged user

Step 1: Open a command prompt window by clicking on Start -> Accessories and then Command Prompt

Step 2: If you attempt to telnet to a server now, Windows will complaint that Telnet is not a valid command

Step 3: Click on Start Button, then on Control Panel. In Control Panel click on Programs. If your view does not look like the one shown on the thumbnail, click on "View By" Category on the top left hand corner

Step 4: On the next screen, choose "Turn Windows Features On or Off"

Step 5: On Windows Features list, scroll down until you find Telnet Client. Check Telnet Client and hit OK

Step 6: Try Telnetting to a server again using the Command Prompt as in Step 2. This time you will not get an error message about Telnet being an unrecognized or invalid command