WIndows 10 1607 - Cannot click Update Date or Check for Updates?

Hello,

We have 5 workstations running Windows 10 ENT 1607 - all are installed via MDT and are managed to a small degree by a handful of basic GP settings. I also have WSUS running here at home - allowing me to manage the update process with ease.

All 5 stations are accessing WSUS using settings created and placed in the registry using the freeware WSUSClientManager tool out there on the internet. This tool has been flawless in creating the correct settings and allowing all machine to hit WSUS without fail.

However - for the June 2017 patch window - I discovered one of our machines was suddenly not able to update correctly. In the screen below - the station is seeing WSUS and is getting the correct three updates it needs. But notice that the Install Now button cannot be pressed.



I first thought it maybe a corrupt WU layout or possible some GP settings gone bad. So I stripped the GP back to default and forced a gpupdate /force command. Then I deleted all WU settings placed by the WSUSClientManager tool and restarted. Still locked out. So I then ran the latest WUTroubleshooter to essentially reset WU back to scratch. Rebooted. Went into the WU Dialog and see something slightly different:




But the bloody "Some settings are managed..." message is still displayed. Making it impossible to even click on Check For Updates

NOTE: I have tried every article I can find that suggests the this "Some settings are managed" message hanging around is some old bug due to some weird telemetry GP setting - have turned all suggested settings on and off to no avail.

What the heck is going on here? I rarely get really stumped but this is driving me crazy. Now I cannot even get the machine to check for updates or anything.

Appreciate any ideas on where to go next.

Cheers,

VP