No internet access but DHCP working.

My computer does not have internet access anymore. On my network, I have a wireless laptop, a wii console, a dsi console and two desktop wired computers. They all work fine on internet except one of my desktops. The defect one can obtain an IP address from my router or from my ISP if I bypass the router. And my ISP can see the MAC address.

When I start a diagnosis on Windows, it says my modem is the problem. But I remind you that it works with other computers (like the one I'm using to post this).

I tried disabling my firewall to no avail. Anyway, even my anti-virus can't get its updates.

The problem came all of a suddent. One day it worked, and the other not.

Also, even though I can renew my IP address, I can never ping the router or any other computer. I cannot access my router's interface.

I hope some of you has an idea because, if not, my next step is a reinstall of windows.



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