Thank you for contacting Intel.
For network connections that are built-in a system, we recommend to install the driver provided by your system manufacturer. You may download the validated driver here - http://support.lenovo.com/ph/en/products/laptops-and-netbooks/thinkpad-w-series-laptops/thinkpad-w540?beta=false
Component: Networking: LAN (Ethernet)
Operating System: Windows 7 (64-bit) or the appropriate Windows* version you have.
Hope this is helpful.