Welcome to McAfee forum.
Are trying to install McAfee from CD or online?
If it is online purchase, please click on the below link and follow the steps to download and install McAfee on yourcomputer.
If it is from CD, insert the CD in drive and install McAfee from and activate McAfee.
If you already tried to install McAfee and got any issues, please reply with exact error message or issue. We all are help to help you.