Weirdest Problem I Ever Saw (Nvidia Drivers)

Ok... I'm really not making this up.. and I've searched and searched to find a solution... (it's not really sim related but I'm desperate for some help)..

Windows 10, 64 bit... fully patched..

I've got a really weird issue with my 1080TI... basically.. I'm running 457.51 of the drivers... and it's fine... good as gold.. no problems whatsoever.. all systems normal. IF.. I update to any version after this... I get this very odd behaviour.. I start the computer (windows 10 64 fully patched as of today)... after a few seconds after logging in i.e. I have my desktop mouse.. etc... can see the screen.. wappaper.. etc.. the screens both blank to a solid colour.. and it's not just black... it's the most predominant colour being shown at the time of blanking.. and that's different for both screens.. SO.. if I have say.. a webpage mainly white.. on screen 1.. it blanks to white... if I have a blue page on my second screen.. it blanks to blue... Once this happens I can do nothing... CTRL+ALT+DEL.. nothing... zero... I have no option other than to hard reset.. and restart Windows.... I do this... the problem returns... it's about 10 - 15 seconds..

First, I figured.. ok corrupt drivers... so.. I did a clean uninstall of nvidia drivers... using the DDU tooling in safe mode (I had to be quick to get it to boot into safe mode before it blanked).. once all off.. I rebooted into windows.. no display drivers.. then re-installed the latest from nvidia.. the problem returned.

Secondly... I installed my old driver.. and then let GeForce Experience do the update and installed over... the problem returns...

I have just repeated the first thing, full removal using DDU tool.. but installed 457.51 drivers... and I'm using it now... it's good as gold...

I mean.. I am at a loss here has anyone seen anything like this before?  Has MS pushed something that breaks older driver revisions?

Any suggestions would be helpful.

Thanks

Craig