If you are using an older version of McAfee like versions 12.8.x and 14.0.x, and you see a message computer at risk, then read this article and find the solutions. To protect computers from viruses, the DATs – virus signatures used by McAfee must be kept up to date. Virus signatures of McAfee software recognize new and old viruses McAfee Windows product to work with newly signed DATs, it must be on version 16.x or newer. If your PC has an older version of McAfee installed, it will not work, and you see the error shown above.