You will need the Acenet recommended SSH client PuTTY downloaded to your local machine before proceeding with this knowledgebase article. You can download PuTTY at the following link:
http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html
See this video walkthrough on connecting to PUTTY:
http://kb.acenet.us/How_to_connect_to_your_server_via_SSH_using_PuTTY