You can tell if the installation is OK by double-clicking the taskbar icon to open Security Center.
If it's got a green tick then you're OK.
If you have any questions about the subscription then call Customer Service or use their online Chat. Linked under McAfee Support at top left under Home products.
Here are two FAQ's that might be helpful:
You can check your "My Account" to determine which product(s) you have purchased or available to install:
If you don't recall which email address you used to register your product(s) with, you can find that by following these steps: