Your download page for your software certainly shouldn't be giving you that warning: https://home.mcafee.com/Secure/Protected/Login.aspx
You have free support if you want to try it. Technical Support Online Chat: http://service.mcafee.com/TechSupportHome.aspx?lc=3081&sg=TS
(Don't use the email option unless you are prepared to wait a long time for a reply).
Thank you for your help.
I have successfully downloaded McAfee to my computer.
I am looking forward to a virus free computer.
Glad you are OK now.