There is a phone number but you have to follow the prompts here: Consumer Technical Support (alter Country @ top right as needed) or you can use the online chat.
More details might help us to help you here. What operating system and service pack is this and what version of Internet Explorer is installed (this is important even if you never use it)??
Does your machine meet the minimum system requirements shown on the product pages?
What is the name of the suite you are trying to install and is it from McAfee.com online or from a retail card or CD?
Toronto ▪ Canada
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http://service.mcafee.com/FAQDocument.aspx?lc=1033&id=TS100119 is the procedure I have to suggest to you to get your software installed.
Please let us know if you require further assistance and if you do then please post some answers to what Ex Brit already mentioned above.
McAfee Volunteer Moderator