To create or log in to a McAfee account, visit mcafee.com/activate. Start by entering your email address and setting a strong password. If you already have an account, simply log in with your credentials. For new users, follow the prompts to verify your email and complete the setup process. Once logged in, you can manage your subscriptions, download products, and access customer support. Remember to keep your login details secure and update your password regularly to protect your account and devices from unauthorized access.