After upgrade DSS fails to start "Error 1053: The service did not respond to the start or control request in a timely fashion" (4263689)

After upgrade DSS fails to start "Error 1053: The service did not respond to the start or control request in a timely fashion"

After upgrading a DSS from Defender 5.7 and below to Defender 5.9.x, the "Defender Security Service" fails to start with the error:

"Windows could not start the Defender Security Service serivce on Local Computer.

Error 1053: The service did not respond to the start or control request in a timely fashion"

Manually executing the DSServADE.exe shows the error:

"The procedure entry point dtResyncToken could not be located in the dynamic link library dtDSK.dll"

Upgrading a DSS to 5.9.x is only possible from Defender 5.8.1 or Defender 5.8.2. A direct upgrade to Defender 5.9.1 on versions earlier then 5.8.1 is not supported and may cause Defender components to stop functional properly..

WORKAROUND

Delete the dtdsk.dll and aal2dsk.dll from the C:\Program Files (x86)\Quest Software\Defender\DSS Active Directory Edition directory may allow the the service to start.

RESOLUTION 1

Revert from a snapshot or backup prior to the upgrade. Upgrade the Defender 5.7 or earlier components to Defender 5.8.2 first, and then upgrade to Defender 5.9.1

RESOLUTION 2

Install Defender 5.9.1 onto a different machine.