Is Telnet been removed from Windows Vista?
No ,by default windows vista doesn’t install Telnet feature and you need to install it.

To install Telnet in Vista do the following:

  • Navigate to Start > Control Panel > Programs and Features.
  • Select “Turn Windows Features on or Off
  • Select “Telnet Client” > Then Click OK.
  • After few seconds you will be able to use telnet old way .