This error can occurs because the Bootcat.cache file, located at %SystemRoot%\system32\codeintegrity folder, is corrupted or because the size of the Bootcat.cache file is changed since the last successful start.

Method 1 : Get Service Pack 1 (If this is not a permanent error)

• Go to Start Menu and type windows update
• Click on Windows Update from the search results
• Click on Check for updates in the left hand side pane
• Select Service Pack 1 from the recommended updates section

It is recommended to set Windows Update to receive all critical updates automatically.

Method 2 : Manually remove the bootcat.cache file

To work around this issue, start the computer from the disc drive or from the USB drive by using the Windows installation media. Delete the Bootcat.cache file, and then restart the computer.

Microsoft has also released informative bulletin KB314438 to address this issue.

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