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Dell OptiPlex Server fails to boot after Bare Metal Restore



After preforming a Bare Metal Restore (BMR) using Datto Utilities and a Dell OptiPlex Server as the target machine, the server fails to boot successfully.


  • Datto SIRIS
  • Datto ALTO
  • Dell OptiPlex


The driver viostor.sys (used by Datto as a standardized interfaced for drive management) conflicts with Dell OptiPlex hardware, and causes the server to boot unsuccessfully.


Remove viostor.sys from the boot process using the Windows Recovery Environment (external link), then attempt to boot the target machine again

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