So haven't made a topic for a while.
I've got a laptop with both a wireless card and a normal network card. I'm normally just using the the wireless at home, but there are times when I want to plug in the cable for a somewhat better stability.
The odd thing is, internet seems to work for a while, but after a while it fails. That even with the other connection disabled. And only restarting the pc with the cable in or wireless on let's me get back on the internet.
(I can still access the Lan network though, just not internet)
I've also tried creating a bridge, or at least I think I've tried with the same effect, with the exception that the problem then preceeds even after restart.
To give more info OS Vista Home premium 64-bit Router zyxel P-660HW-T3 v2
It sounds more like a problem with your network than your computer's hardware.
Try taking your laptop to a friend's house or something, and plug into their LAN. See if that works any better.
Hmm, since you're running Vista, did you check for power saving options on your network interfaces ? Heard those might cause issues...
Have you tried using a static IP? It may not work but it makes it less likely that something is fucking up between the PC and router.