>I'm looking for a clue here.
>
>My ISP is Bell and I use a Bell DSL modem/router. My own pc (desktop) is hard wired to the modem through an on board ethernet adapter. I can also use my office pc (laptop) through the wireless connection.
>
>So, Thursday morning I was working with my PC and with the laptop and everything was good. Been working this way for a year. Eventually I turned them off and left them. Thursday evening I booted up my PC and, while the network connection to the modem seemed to be fine, I couldn't get an internet connection. I powered up my laptop and got a wireless connection and the internet connection was fine.
>
>I figured I the on board ethernet on my PC had gone south, so I disabled it and put in a new ethernet card and attached a new cable. Still no internet connection, but the network connection to the modem still looked good. Next I uninstalled the ethernet card and tried a wireless adapter. Signal 100% and good connection. No internet connection. Meanwhile the internet connection from the laptop is still fine.
>
>It doesn't appear that the modem is the problem since the laptop works great with it. But my own PC just can't get an internet connection nohow. I can't even ping the router.
>
>Nothing has changed in the firewall or anything else. The only thing my PC was doing between the time it was getting an internet connection and when it was not, was that it was turned off.
>
>Like I said, looking for a clue here. Any thoughts?

A few semi random ideas/comments:

- View your System and/or Application Event Logs for errors

- Go into Device Manager and check to see that network adapters are reported as "working properly". See if any other devices report problems

- You could try booting in "Safe Mode with Networking" - press F8 repeatedly during machine boot, and select that option. That could help determine if some higher-level program like AV or antimalware (or malware itself) is blocking access

- Wireless networking often has an annoying "feature" that if you mistype the password/passphrase you don't get an error to that effect, you just get 5 bars with no connection

- I couldn't tell from your various messages if you're using a static or dynamic IP address for that computer. For troubleshooting purposes set and leave it dynamic. Check to make sure the IP address you get is on the same subnet as the functioning laptop and that it's different from the laptop. Go into the detail property sheets of the network adapter and see if they're the same as for the working laptop

- You've done a good job swapping out hardware but I don't see that you tried a different Ethernet patch cable with a wired connection

- Can you access the modem/router's configuration (usually via embedded web server at the router's IP address) from the laptop, and see if there are any weird settings that could be blocking access - MAC address filtering etc.? Does your ISP limit the number of machines that can share the modem/router device (that's something they might be able to enforce while provisioning the device)?