It is well known that the Telnet command is used to allow a user to log on to a remote host system, but this is also the equivalent of leaving a tipping point on the hacker, so the user usually chooses to turn it off, and how do users turn it on when they want to use the telnet command? Let's look at how to quickly resolve the system telnet command expiration problem.
1. On the desktop to find the computer icon, right click on the computer to open "Control Panel (C)" into the next step. As shown in the following figure
2. Click to open Control Panel – all Control Panel items – programs and functions. As shown in the following figure
3. In the Program and Function panel, click on "Turn on or off Windows features" to go to the next step. As shown in the following figure
4. In the Open Windows Features window, check "Telnet Client" to click OK to complete the operation. As shown in the following figure
The above is how to quickly solve the system telnet command invalidation problem, have encountered such problems or are being plagued by such problems users can try the above methods to see, I hope the above methods can bring more help.