In order to rebuild the Drivercache:
1) Stop the recording server.
2) Navigate to C:\ProgramData\Milestone\XProtect Recording Server\DriverCache\nativedrivers\. Remove the file from that directory.
3) Navigate to C:\ProgramData\Milestone\XProtect Recording Server\offline\ and remove the files as well.
4) Restart the recording server, and let it rebuild the database.
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