heres what i did when my ethernet and wireless stopped working, and it fixed it.
Go to Network and sharing center.
Click "change adapter settings"
It should show your wireless and LAN (Local Area Network) connections.
Right click LAN and click on "Properties" (Make sure you are using an admin account)
Click on internet protocol version 6.
At the bottom, a new option called "Properties"
Click on that.
Make sure that the cicles "Obtain ipv6 address automatically" for both.
Hit ok and then click on "Internet protocol version 4"
Go to properties.
Make sure that those same cicles are marked.
Click ok and close out of LAN, but not Adapter settings.
Right click on "Wireless Network"
Click properties and do the same thing that you just did for LAN.
This should work, depending on if that was the problem or not.
It worked for me, so i hope i helped
-ChriS, ComputeR WiZ In TraininG