The network adapter on my desktop stopped working, and it has no PCI slots, so I picked up a Gigaware "USB to Ethernet Adapter" from RadioShack. There's no product number, just the name.
Using this adapter I'm unable to connect to the internet (Windows 7), while another computer using the same Ethernet cable connects just fine. The troubleshooter tells me the adapter ("Local Area Connection 2") "doesn't have a valid IP configuration." I have tried setting the IP and DNS manually. If I do so it still doesn't work, and the troubleshooter cannot identify the problem.
I have tried using the same adapter on a laptop. The laptop had the exact same problem, being unable to connect, until I turned the Wi-Fi on. At that point, for some reason, having the Wi-Fi for our network on allowed the adapter to auto-configure itself to connect to the same network. Now, when used with the laptop, the adapter works permanently, even with the Wi-Fi switched off.
I can't figure out how to fix this on the desktop. The desktop doesn't have Wi-Fi, so I can't use the same solution as with the laptop. If you think the adapter is hopeless I'm open to buying a different one online, or even replacing the desktop. You can find the results of the command "ipconfig /all" here: http://pastebin.com/JedsZMxE
Edited by npw, 10 May 2015 - 10:48 AM.