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#11
Okay, the firewall technique did the trick. I disabled the firewall and rebooted, that didn't work. Then I enabled the firewall again and rebooted. Still didn't work, so i ran windows troubleshooter on both the network card and Internet connections from "Control Panel\All Control Panel Items\Troubleshooting\Network and Internet". I don't know what Windows did exactly, but upon rebooting, the problem was not occuring anymore. I rebooted 3 more times, just to be sure, and so far so good.
I owe you thanks and gratitude not just for that, because without wanting to, you've solved another gripe I had with windows 7. By having Network Connections and Network List Service set to automatic, I can now see my other Win 7 computer in the network section in the explorer navigation pane.
So, thank you very much.