PuTTY

on the CS50 Wiki

PuTTY is a free SSH client for Windows that you can download from http://the.earth.li/~sgtatham/putty/latest/x86/putty.exe. Once downloaded, there's no need to install PuTTY, per se, since what you just downloaded is the program itself! You're welcome to move it to C:\Program Files\ or wherever you'd like. To run PuTTY, simply double-click its icon. You should see a window like the below.

Let's make a few changes to its configuration, though. Under Host Name (or IP address) enter the address of a server to which you plan to SSH (e.g., nice.fas.harvard.edu), then type that same address under Saved Sessions, then click Save. Your window should then resemble the below.

To actually SSH to a server, double-click, e.g., nice.fas.harvard.edu under Saved Sessions. If you see a window like the below, click Yes.

When prompted to login as, enter your username, then Enter, then your password (whose characters you won't actually see for security reasons), then Enter. You should then find yourself at the server's prompt, as in the below!