My Ethernet port was causing troubles (in windows) within a few weeks after installing ubuntu but it did worked on ubuntu. Somehow It worked on windows after un-installing the driver and rebooting to windows. I stopping un-installing and re-installing the driver and just used wifi on windows but recently when I switched to ubuntu it stopped showing the lan (networking setting also dosen't have ethernet settings) and when I rebooted to windows the network and sharing center dosen't show ethernet. I am new to linux so don't know much. I tried to scan for hardware changes but nothing changed in device manager.
I now have two problems.
a) Which driver to install?
b) After installing it should work on both OS.