OK despite some driver and default configuration issues
The installation of all the Windows drivers could not be done only with the downloads on the manufacturer's website, indeed the device manager still displayed a lot of warnings after all the available installations. With the supplied CD, the warnings disappeared but of course the drivers were a bit dated. Finally I used a driver update software to update my system.
Now my machine works properly but for a period I had a lot of BSODs and untimely reboots, even with all the drivers up to date. I'm not sure of the causality, but the end of these problems coincided with changes I made in the BIOS (Asus Perfomance Enhancement and Aura disabled).