I am only guessing but I think you activate the 1mth subscription and then go into your account and the option might be there that or right click the Mcafee shield and verify subscription that might help. If still in a confusion call Customer support
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Hope you're issue is resolved with @peacekeeper suggestion If not, Contact McAfee Customer Service by calling the number for your region. See: https://service.mcafee.com/ContactCustomerService.aspx?lc=1033&sg=CS&pt=1
Please have your Dell order number or customer number so that they can quickly assist you. If you don't know your Dell order number or customer number, contact Dell support to obtain that information before contacting McAfee Customer Service.