SCCM 2010 - Component Status (Type & Availability) - Unknown for all components

Hi all

Following a server restart I have an issue whereby all my components are displaying as availability unknown.  I have tried a reboot of the server and this has made no difference, even after waiting.
compmon.log & compsumm.log don't offer any insights and my google fu has been exhausted.

If I right click on a component and look at the messages, they are all present and as I'd expect.

If anyone has dealt with this before, and can offer any insights, I'd be most grateful. 

Server 2012R2, Single primary site, SQL on same box. hosted on vmware.