SIRIS, ALTO and NAS: Failed screenshot showing Windows desktop



A screenshot verification fails, and the screenshot shows the Windows desktop.


  • Datto SIRIS
  • Datto ALTO


The screenshot verification process uses image processing to analyze the captured screenshot of the virtual machine. If the Windows machine being virtualized does not require authentication to log in, the image processing software may analyze an image of the Windows desktop instead of the Winlogon interface, causing it to fail verification.

Figure 1: The Windows desktop screen without login credentials 


Configure the Windows machine to require credentials to log in.

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