Total lag in startup screen

In loading screen it takes forever to load. Game is unplayable. a reload takes about 5-10 seconds. impossible to walk and so on.
Only played SP with PC and it worked great with the highest settings in graphics.
I downloaded an update from September 8, 2020-KB4576478 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 2004.

After that, impossible to play. updated every driver on laptop, reinstalled game, deleted save game, deleated .NET updates.
After the latest update of GZ It is even worse than before.
It is the only game I’ve tried with this kind of failure. All other games works perfectly.

I’m running the game via Steam. and tried everything in steam as well.
No dropzone file to delete
Lenovo y700
Nvidia 960M
Intel i7-7700
16gb ram
win home 64

Win 10 updates are notorious in messing up people’s PCs, so, nothing new here. Fixing it, however, is different matter and here, i’d go with clean Win install.