How to uninstall or reinstall supported McAfee products using the Consumer Products Removal tool (MCPR) explains how to install your software on your laptop.
Please be sure if you had any previous security software installed that you have completely removed it and used the appropriate removal tool to be certain there are no remnants left over.
You should have an online McAfee account where you can login to download and install your software. This is explained in the link above.
Moved to "My Account Online" as a more logical spot for it.