robertf

I also tried running it from the Start menu as administrator, with the same result. I've attached a screenshot of the error-message window. 

Partly. When the shop installed Windows 10, they did it in French. When I added my account I did it in English, and the interface is in English, but occasionally...

It's definitely 64-bit and Windows is fully up to date. .NET Framework 4.8 was installed but not .NET Framework 3.5 so I installed it and then rebooted. Still no luck...