Internet connection problem

Internet connection problem.

I hope this is the right place to ask this.


INFORMATION
===========
windows XP home fully updated.

firewall: latest zone alarm free version

anti virus: latest avg free

using IE7

computers 1: desktop, WiFi connection to broadband router.

computers 2: laptop, WiFi connection to broadband router.


PROBLEM
=======
everything was fine until this evening.

now I can not connect to the Internet through my desktop PC.

I can connect to the Internet using my laptop. no problems there.


I get the message
Internet Explorer cannot display the webpage

I can however access the WiFi's router setup menu vie IE7.

the signal strength indicates in the system tray is excellent 85%

I can connect and transfer files between my laptop and desktop
and vice-versa



they are both connected to a broadband WiFi router, both wirelessly
no cables at all.

the only two things I have done tonight are:

1) connect a camcorder to the firewire port for the first time, this set the new hardware wizard working, all went OK (I think) and I captured a bit of video from the camcorder using Microsoft movie maker.

I don't know if this has upset the onboard WiFi which seems to be connected through a USB interface even though the WiFi it is on the motherboard.

I have now disconnected the camcorder and all cables..



2) updated AVG anti virus.


I have tried so far;

disabling the firewall and the anti virus software both disabled at the same time.



what should I do next?

thanks

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