i have a belkin pre-n router and a pre-n wireless network card both second hand, i am connected @ 100mbs but can't access the internet. can you help please?

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Welcome to DaniWeb !

Are you using Wireless or Wired Media to connect PC & Router ?

what is you ip address open command prompt and do ipconfig /all and can we safely assume you are using windows

Welcome to DaniWeb !

Are you using Wireless or Wired Media to connect PC & Router ?

I AM CONNECTED WITH WIRE, MAIN COMPUTOR THEN TO BELKIN PRE N ROUTER. TWO LAPTOPS WORK FINE WIRELESS WITH THE ROUTER. ONE OTHER DESKTOP IS WIRELESS, SHOWING 100MBS CONNECTED BUT CAN'T BROWSE THE INTERNET. I TRYED SHUTTING DOWN ALL FIREWALLS BUT NO CHANGE. THE PROBLEM HAS HAPPENED SINCE I INSTALLED A SECOND HAND BELKIN PRE N NETWORK CARD.

Welcome to DaniWeb !

Are you using Wireless or Wired Media to connect PC & Router ?

USING WINDOWS XP, I HAVE TRYED REPAIR CONNECTION

I AM CONNECTED WITH WIRE, MAIN COMPUTOR THEN TO BELKIN PRE N ROUTER. TWO LAPTOPS WORK FINE WIRELESS WITH THE ROUTER. ONE OTHER DESKTOP IS WIRELESS, SHOWING 100MBS CONNECTED BUT CAN'T BROWSE THE INTERNET. I TRYED SHUTTING DOWN ALL FIREWALLS BUT NO CHANGE. THE PROBLEM HAS HAPPENED SINCE I INSTALLED A SECOND HAND BELKIN PRE N NETWORK CARD.

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Means you are trying to connect Internet in Wireless Desktop Computer ?
If yes then same configuration will be applied as in Laptop (As you says Laptop working fine). Just the IP count will change.

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