The rule i heard of is if the product is not the same ie antivirus when you had total protection installed you have to uninstall fully and reinstall via the cd.
As this is a preinstalled setup best you contact customer support they will know for sure.
Moved to General Discussion. That uninstall mentioned is so that any online accounts are decremented accordingly.
As it was a trial I recommend complete removal, cleanup and reinstall as per: How To Uninstall/Reinstall McAfee Consumer Products EXCEPT Anti-Theft
Marked as assumed answered as 9 months old post. Locked