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When saving or performing other functions in ArcMap the following error occurs:
"Driver Version Mismatch"
The Windows Update site can install an older WHQL-certified version of the display drivers than what is on the system, resulting in mismatched file versions.
Upgrade the display driver to the latest version, or remove and reapply the version currently installed.
If the error occurs when saving, a temporary workaround is to disable the 'Save thumbnail image with map' option in Map Properties.