Wrt54g and hp laptop

I have two PCs connected to the router by wired and they are working fine. My laptop was working fine with the wireless until I install AVG anti virus program on it. Will a anti virus program be the cause of my problem. I cannot connect to the internet anymore. No connection available even when I sit my laptop right next to the router. Thank you

Hi,
I don't know if this is the same issue.  I have a Compaq laptop (which is HP, both companies are together now), it is more than 3 years old and only had a 11b wireless card internal.  So I bought a PCMCIA 54g from Linksys and with the latest software if I boot my laptop with the card already connected, it does not automatically connect and have a hard time making it work, but then I pull the card out of the PCMCIA slot and push it back in and then it gets an IP and is happy.
So I got the habit of booting my laptop without the card and inserting once booted.  I guess you could reproduce this behavior with an internal card by disabling and re-enabling it.

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