
A few weeks ago we (not the royal we, we as in it's a family machine) got a new laptop to help with working from home. It's a good, but not absolutely top of the range, spec gaming laptop. It's certainly good enough to play the Witcher3 though.
I installed (and patched) The Witcher 3 on it (yeah, I said working from home

When I try to run it, there is a moment or two while things are loading, the screen goes blank for a short period of time (<1 second) and then... nothing. I'm just back at the desktop or GoG galaxy (depending on how I tried to start it). The brief black flash appears at roughly the time I would normally expect the game to switch to its own visuals (gauging that against how it starts on my desktop PC).
I have tried searching through forums for advice and I have contacted CD Project Red's help and... nothing. I have spent literally hours downloading, re-downloading and trying to get it to work. Nothing. I had a dialogue over several emails with CDPR and eventually they just gave up. There is nothing particularly odd about the laptop - all pretty good industry standard stuff.
Laptop is
Win10 64 bit
Intel(R) Core(TM) i5-10300H CPU @ 2.50GHz (8 CPUs), ~2.5GHz
16384MB RAM
NVIDIA GeForce GTX 1650
Realtek High Definition Audio
I have tried the following:
Ensuring all drivers for the machine are up to date
Running as admin (galaxy and witcher3 exe)
Running in various compatibility modes
disabling nVidia experience
verifying integrity through galaxy
repairing install
running sfc /scannow
disabling antivirus
clean booting
deleting gog.dll
a fresh uninstall/re-install
setting fullscreen mode to 1 by editing the preferences file
Reinstalled Visual C++ Redistributable Packages (using links provided by CDPR)
Removed GoG galaxy and reinstalled The Witcher3 from the offline backup installer
Tried installing on SSD and HDD.
Rolling back the updates
The laptop does have an onboard Intel graphics card too but it is properly set up to use the nVidia card and I have also tried setting the startup options for the Witcher3 to only use the nVidia option and tried running the game from Within the nVidia experience program (which sets game specific options for the Witcher3).
Plenty of other games work. The Witcher3 is the only one that has caused a problem.