Telnet is disabled by default in Windows 7 and Vista for security reasons, but users can re-enable it through the Control Panel by opening Programs, clicking "Turn Windows features on or off", ticking the box for "Telnet Client", clicking OK, and restarting their system, which will allow them to use the telnet command again.

1. Enabling telnet on Windows 7
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2. If you’re an avid Windows Vista or Windows 7 user, you might notice that the “telnet”
command no longer works – this is because it’s disabled by default in Vista and above, for
security reasons. You can however simply re-enable it from the control panel:
Go to control panel
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3. Click on programs
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4. Click turn windows features on or off
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5. Tick telnet client and click ok
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6. After finish close the window and restart the system
Now the telent service was enabled and we can use it
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