Hello Aleksander, how are you?
My name is Paloma B., I am very happy to be able to try to help you in the best possible way.
This is an open community, whenever you need you can share the problem so that possible repairs are suggested.
Could you give more information about the problem, please?
Please share screenshot or photos of Windows boot settings in your BIOS?
Probably in the new installation on disk b, the drivers are missing, you need to go to the manufacturer's website to download it, so the internet must not be working.