VMware vSphere UpdateManager had an unknown error. Check the events and log files for details.

In Update Manager of vSphere Client 5.1, when you are attempting to ‘remediate entity’ to apply some patches, you get this error:

“VMware vSphere Update Manager had an unknown error.  Check the events and log files for details.”


This may be because there is an ISO mounted in the CD/DVD drive of one of the VMs that will need to be vMotion’d.  Removing the media by switching over to ‘Client Device’ in Edit Settings may resolve it.



Posted under: vmWare vSphere

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