Download putty.exe and double-click on the icon of the program you have downloaded. The first time you run this application, you will need to type 22 under Port. Make sure you check the SSH button under Protocol:.
Each time you run PuTTY, you will need to type minerva.simons-rock.edu (or simply minerva if you are on campus) under Host Name (or IP address). Click on the Open button to connect. The first time you will be presented with a Putty Security Alert; click OK. Type in your user name and password when prompted.