This worked for me! Thanks OP. Just fished some Cat5e, so i could avoid my shotty WLAN mini card, just to find out that my network card was not working! I installed the drivers, restarted, repaired the driver, uninstalled when it didnt show, restarted and here i am with hard wired internet.
Thanks, tried, didn't work. Still no Ethernet connection. Starting to suspect t may be motherboard. The Ethernet randomly connects every few weeks and then stops. It's pretty weird, I also noted that when it does connect, I immediately look at the Device manager and can see that the Broadcomm Ethernet driver is there; however, when I shut down or reboot, it's gone again. Disappears off of the Device Manager.