I'm often sitting in front of a Windows based PC when I need to work on a Linux server or Mac OS X workstation. If all you need is a terminal emulator for command line access, you should definitely have a copy of the Open Source...

putty Telnet/SSH Client

...for Microsoft Windows. I recommend using SSH (the first S is for secure) instead of Telnet whenever possible (and that is usually always if port 22 is available) to access remote servers or workstations. Version 0.59 was just released. There is no installation. Just copy the EXE binary file and double click on it to launch it. I recommend changing the color scheme for the terminal though. It defaults to white letters on a black screen. I prefer black letters on a white screen.