@Sunshine Yeah, that's one of the things I tried. The computers can access the network, but the Windows 7 computer can't do UDP/IP networking in games like Starcraft, Warcraft III,and Command and...

@Sunshine I tried testing another network card, and that didn't work.

@Sunshine I'm going to try to get a hold of another NIC. How plausible is that solution?

@Sunshine Back. I tried resetting the router. That trick didn't work. The Windows 7 machine was browsing the web, but that was never the problem. The problem was that it wasn't able to connect to a...

Yes, it was better before I put Parental Controls on. No, I haven't tried resetting the router. Perhaps I will try that.

I should add that I am still able to browse the network shares of the other computers using any computer. Just so you know.