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Desktop 4 (Windows 7): .NET Framework Error: middleware.dll or dependencies not found

Affected systems:  

Windows 7


When Lytro Desktop 4 is launched, a Microsoft .NET Framework error appears, stating "Could not load file or assembly 'Middleware.dll' or one of it's dependencies..."


  • Please download and install the attached Microsoft VS 2013 redistributable (attachment at bottom of this article)
    • This file puts needed Microsoft software onto your computer. We install these files as part of our installer, but it appears to have failed to run properly.
  • After install, reboot your computer
  • Download and install a new copy of Lytro Desktop from
  • If you continue to have problems, please contact Lytro Support at, noting that you have followed this KB (