do you have a paid subscription? you will have to go to there site, and download the version you paid for, unless you have the disc.... to remove it there is a McAfee removal tool, also on there site. McAfee-Antivirus Software and Intrusion Prevention Solutions
if you don't have McAfee yet, there are plenty of good (free) anti virus software AVG Anti-Virus Free Edition - Reviews and free AVG Anti-Virus Free Edition downloads at Download.com
you must still use the removal tool from McAfee...good luck
***EDIT*** slow typing again, sorry richard !!