"Failed to create the VirtualBoxClient COM object. The application will now terminate. return Code : REGDB_E_CLASSNOTREG (0x80040154)" Reported Starting VirtualBox GUI after upgrading to VirutalBox 4.3 and later

(Doc ID 2189813.1)

Last updated on OCTOBER 21, 2016

Applies to:

Oracle VM VirtualBox - Version 4.3 to 5.1 [Release 4.0 to 5.0]
Microsoft Windows x64 (64-bit) - OS Version: 7
Microsoft Windows (32-bit) - OS Version: 7

Symptoms

After upgrading Oracle VM VirtualBox (VirtualBox) to a version between 4.3 and 5.0.26, attempting to start the GUI will product a pop-up window with the message:

 

 

Changes

 Updating VirtualBox from a release before 4.3 to a release before 5.1.6 or 5.0.28.

Cause

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