Use the McAfee product key or eCode found at mcafee.com/activate to reinstall your McAfee product. 1. Uninstall the existing McAfee software (if applicable). 2. Visit the McAfee Activation Page through Mcafee.com/activate. 3. Sign in to your McAfee account. 4. Enter your product key or e-code. 5. Download and install McAfee. 6. Run the installer. 7. Turn on McAfee https://www.mcafecomactivate.com