We found some on ebay - $US13 each - and we purchased 30 of them. We asked HP to assist locating these chips - they said $80AUD per card.! The laptops are two years old - not worth it really. Given the number trying to log in to the access points together with noisy environment we upgraded the Realtek Card with an Intel 5100 agn card like yours. We have 350 x HP 620 laptops (we are a school) and they came with a 2.4ghz Realtek card. We have been having enormous problems with this WLAN card. Everything is faster than ever and since my Netgear WNA3100M is low profile and I use an extended life battery that sticks out a bit, I don't even notice it. Both are usually 300 Mbps despite my router being in my Basement in an old house.

That's right, Network and Sharing Center shows both Wireless Adapters connected to my wireless network and the Internet. No disconnect from the network and no 5100 seemingly disconnecting my WNA3100M. Now I have both the 5100 and my Netgear WNA3100M connected all of the time even after restarts. My network was there and I put in the password instead of trying WPS, WPA2 personal with TKIP because my Router did not like the AES selection and told me so. Looked and the deleted 5100 was back so I Connected it from the Network and Sharing Center, Change Adapter Settings, Highlight the 5100 that was shown with a Red X, Brings up menus at the top and Select Connect To. So I did a WPS connection of myWNA3100M which maxed it's speed and seemed more stable for a day. I did not want to remove 5100 and I finally ended up with a Netgear WNA3100M that I hoped would work well with my Netgear DGN3500 modem/router.

My ASUS Win 7 Ultimate 64 Bit machine kept disconnecting after deleting the AGN 5100 driver and after a restart the Driver would reload it self and the connections were alway dropping whether I constantly deleted or disable the 5100. I bought a couple of different USB network adapters to fix this but AGN 5100 drivers would keep loading and seem to cause them all to constantly disconnect.

Intel wireless wifi link 5100 driver xp