Did you try it with the wifi in the router disabled?
I'm an avid reader of your tech questions and answers, and like to think I have learned a lot through them. I now have a question of my own.
My computer frequently kicks me off the internet, sometimes it takes me half an hour or more to regain access.
System information - I have an HP Pavilon m9150f, intel quad core CPU Q6600 @ 2.4 GHz, 3 gigs of RAM, 32 bit system with windows vista. My NIC is a Realtek RTL8168C PCI-E GBE NIC, I also have an internal USB 802.11 b/g wireless, and a D-Link DWA-142 wireless N external USB adaptor. I have cable internet, my modem indicator lights show I have a connection, even when my computer says I don't. I've contacted my ISP and they said my modem has not logged any connectivity issues.
When I lose service, I run the network diagnostics, and it gives me one of 3 messages. Either 'there is no problem with your internet connection', 'this is not a problem that can be automatically resolved', or 'resetting your network adaptor may correct the problem'. Regaining internet service is hit or miss, resetting the adaptor sometimes works, unplugging the modem sometimes works, turning everything off sometimes works, sometimes nothing works.
History - started with the built in wireless kicking me out. Bought the N wireless, same issue. Now run through CAT5 cable, still same issue.
I have the latest driver updates and the latest windows updates. Any help or suggestions will be greatly appreciated.