Hi Humble,
At the moment we're in a diagnosis process to identify the root cause. I'm not eager to just provide random suggestions with anything I may find unless I'm certain it really does contribute to the point where we want to get. Until now, my suggestions were to confirm the Windows Managememt Instrumentation service is as it should be, which it appears to be. From this perspective I'd say we are making good progress.
Simple thing, but are all updates in Windows Update installed?
EDIT: if you remember things that you tried, but haven't yet mentioned, please post them.