Thank you for posting your query in Wired Ethernet community.
We have Windows 10 driver for X540-T1, kindly visit the link below for download:
Additional reference site below indicating X540-T1 supported on Windows 10.
Kindly share additional details regarding the information you mentioned about Windows 10 does not eve acknowledge the card.
I downloaded the ProWinx64.exe but the adapter does not show up in the device manager.
Interesting fact: the 10gb switch lights up as if the adapter is working and data is received.
The onboard adapter is an Intel i217-v running at 1Gb. If I unplug the 10gb cable attached to the X540-T1 I get no network connection.
If I unplug the i217-v, I still get data flowing through the X540-T1.
when you unplug the i217-v, the X540-T1 shows up in device manager? Have you tried installing the X540-T1 on another windows 10 system or plug in to different ports in the 10Gb switch for further isolation?
please run the system support utility and attached the output file in the community thread.
the output file will help provide additional information of your system such as network adapter installed, settings.
kindly share your 10Gb switch brand and information as well.