I would contact McAfee support.
You've just bought the product, give them the chance to help fix it.
If they cannot fix it, then consider getting a refund and switching products.
EDIT: Every software company will have glitches/flaws. So when they do go wrong, use their support. Nothing is 100% free of issues. What is unfair on the software provider is not to tell them about the problem and not give them the chance to help their customer.