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Parallels Tools installation fails with "Error 1935. HRESULT: 0x800700C1"

APPLIES TO:
  • Parallels Desktop 9 for Mac Standard Edition

Symptoms

I cannot install Parallels Tools. Installation fails with an error: "Error 1935. An error occurred during the installation of assembly component. HRESULT: 0x800700C1"

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Cause

This error message indicates that some of the system files (dll) are missing or corrupted.

Resolution

Please try to repair your system: - Start the virtual machine

  • Go to Start, type 'cmd' (without quotes') and hit return/Enter

  • Right-click on cmd > Run as Administrator

  • Type in:

sfc /scannow and hit Return/Enter

If the system cannot be repaired, you will get a message: "Windows Resource Protection could not start the repair service".

This message means that you need to reinstall Windows OS or create new virtual machine as per this article: Installing Windows on your Mac using Parallels Desktop




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