How to Fix the McAfee Updated .DAT File
McAfee DAT files, or virus definitions, contain virus signatures that McAfee uses to keep your computer protected from the countless infections in circulation. McAfee products such as VirusScan, VirusScan Pro and Internet Security Suite use DAT files for the most up-to-date database protection. For that reason, you need to ensure that the DAT files on your system are always fully functional. If they are not, your system is seriously vulnerable to virus attacks. You can fix McAfee DAT files with native tools on your system, such as the System File Checker.
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Instructions
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Press the "Windows" key and the "R" key at the same time. This will open the Run utility.
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Type "cmd" (without quotes) in the Run field and press "Enter:" This will launch the Command Prompt.
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Type "sfc /scannow" (without quotes) at the prompt and press "Enter:"
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Exit the Command Prompt.
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