https://www.pcworld.com/article/2089404/how-to-easily-find-drivers-for-unknown-devices-in-windows.html

The important bit is ven_xxxx&devxxxx which ID the maker. And what it is

But the official HP site will probably tell the same. Just find the model number of the all in one

Thanks guys.

I did as suggested and ID'd the reader then found a driver update and installed it.

All good now.