So, my mom brought home this computer and I started it up, and it was brand new, like, operating system still not installed. So, I popped in the cd that was in a case that came with it [everything matching the system settings, etc.] and installed the operating system. So, I'm thinking: Huh, what luck! ...Wrong. I plugged in the Ethernet chord to connect it to the internet, and it's not even pulling up an LAN Icon. So, I go into Device Managers, and the Network Adapter is missing. So, I'm lost. Any of you smart people got any advice?