Probably trial software put there by the maker of the machine.
Assuming this is/was the consumer product.
Uninstall all McAfee products listed in Control Panel > Programs and Features
Run the MCPR cleanup tool and reboot.. That should remove all remnants.
They should be gone after that is completed.
If you see Anti-Theft listed then you must contact Technical Support for that as the above will not work.
It's free by phone or online chat and linked under Useful Links at the top of this page.