I didn't uninstall Symantec Client Firewall before, just disabled it. I went to uninstall it now and the uninstaller encountered a fatal error. I rebooted and the firewall was all screwed up. I was then able to uninstall it. It still doesn't work, but the fact that the Symantec PoS software was so screwed up that it couldn't uninstall properly kind of points a finger at it. Tomorrow I'm going to try to reinstall it in the hopes that it will write over whatever is halfway installed now.

Also, not nVidia, Broadcom. And I tried the netsh thing to no avail, although it did claim to change some registry values.