Strange Connectivity Issues, Please Help!

Hi there,

In the past two days, my computer (self-built with wireless adapter installed) has lost the ability to access the internet, and if it does, for minutes at a time. Other computers in my house are able to connect to the wireless, but not mine. The Windows Network Diagnostic reported that the network "doesn't have a valid IP configuration, but I am skeptical to this because of the fact that my computer is the only one having this problem. I have tried uninstalling Norton Internet Security, reinstalling my wireless adapter's drivers, but neither have helped. I have been using this machine for about 5 months now, and this is the first time a problem like this one has occurred. My Ethernet port has also stopped working, so an offline solution would be optimal.

Definitely willing to share system specs if needed

Thanks