Sounds a little odd. Did you try uninstalling the adapter, then rebooting to see if Windows would reload it? I am guessing that you have already tried this since you did try to update, oft times an uninstall then reboot does the trick, depending of course on the issue(s).
I've been having some issues with connecting to the internet via ethernet cord on my college campus and I'm not sure how to fix it. Wireless works fine but as soon as I plug in, I get zero internet access. I've tried several things such as updating my LAN drivers and starting my computer up with limited 3rd party software to see if that was interfering any way, but nothing has worked thus far. I've tried testing the connection with different cables that are known to work on other computers and using different points of access but that doesn't seem to be the problem, either.
When I run diagnostics I get, "the connection between your access point, router, or cable modem and the internet is broken" as a response. I'm starting to think that my NIC is bad, but I'm not completely sure... Any ideas?