The solution to the win10 system prompt that the telnet command is not an internal or external command is: first open the control panel; then enter the [Programs and Features] option; then click the [Turn Windows features on or off] option; and finally check [ Telnet Client] and click [OK].
1. Search for Control Panel and enter;
2. Click Programs and Function options;
3. Then click to enable or close Windows function options;
4. Find the telnet client , Windows 10 is not checked by default, click OK after checking;
5. Wait for the startup to complete.
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