Hi pacerboy,
OK, I could see that the subscription provided via your bank is been registered with your @yahoo.com email address (Email not posted for privacy sake)
All you have to do is , On the second PC , logon to http://us.mcafee.com/root/login.asp and enter your email address and password
If you don’t remember the password , you can use the "Forgot my password" option on the same page
Once you are logged into the account page , click on Download for 3-User McAfee Internet Security and continue with the download process
For your better assistance , you can have a step by step install process from this FAQ here :http://service.mcafee.com/FAQDocument.aspx?lc=1033&id=TS100342
Thanks,