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What does it mean when MBSA displays a message that the checksum is invalid, and the file version is equal to or less than what is expected?

April 26, 2017checksum displays file invalid MBSA mean message version

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What does it mean when MBSA displays a message that the checksum is invalid, and the file version is equal to or less than what is expected?

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To determine that the correct version of the file is installed, MBSA examines the checksum and the version of the file on the computer. Then, MBSA compares the checksum and the version with the checksum and the version that is listed in the XML database. If you receive an invalid checksum warning message, the file on the computer is not the same version that the software update provides. This situation may occur when a valid Microsoft file was installed with another software update. The file may be acceptable if the file version is the version that MBSA requires to identify the software update as installed.