I'm not sure to be honest, I likely updated in the last few weeks. It wanted to an update yesterday before I ran it and chose to remove 'Previous Windows Versions'... and everything broke x2.
Anyhow... 5 hours later... My solution was to wipe the SSD and clone these two machines from another good source.
Take aways from this... Have a better backup plan... and sorry team, I won't be reinstalling ccleaner for a while. This was a deep burn of time.