Not validating identity wireless
I suspect a firmware upgrade probably fixes that behaviour. If you want to accept both computer credentials and user credentials you'll need to name both "Domain Comptuers" and "Domain Users" in your policy.
By default, XP will re-authenticate with the user credential after the user logs-on (there is no way to do computer-only with XP, I believe).
Please refer to the documentation of your vendor's card in order to turn it off as this may interfere with the procedure here documented.
 = If the eduroam network does not show up, click on Refresh network list.
If the Enable IEEE 802.1x authentication for this network box is checked, it will trigger the “unable to find a certificate to log you on to the network” message because Windows is looking for a certificate but your wireless router is not set up for certificate security.
Step 6 Select the Connection tab and check the Connect when this network is in range box.
If, for any reason, the connection turns to Manual, in order to re-connect, just bring up the available Wireless Network Connection window by double-clicking its icon in the tray bar , select eduroam and click on Connect.
In order to configure the connection back to Automatic, edit the eduroam profile, go to the Connection tab and check Connect when this network is in range: Figure 14: Setting Automatic connection  = If the Wireless Network Connection icon is not present, this may be due to the wireless network manager of your vendor's card taking over from Windows' built-in one (Wireless Zero Configuration).
When you try to log onto a wireless network, you may see this error message: “Windows was unable to find a certificate to log you onto the network xxxx”. Step 2 Double-click Network Connections in the new window.
Manually configure a static ip address for the wireless network to see whether it can access the internet.
I recently bought a new Linksys wireless router and after setting it up with basic WEP security, I tried to logon from my laptop and was successful! So then I tried to connect from my desktop computer that has a wireless USB adapter attached to it and I ended up getting this error message: Fabulous! I checked my settings on the wireless router to make sure I didn’t accidentally setup certificate security, but found no such thing.
Step 7 Select the Association tab and uncheck the “The key is provided for me automatically” box, then select Network Authentication & Data encryption and type in the Network key according to the wireless settings on your router.
A Service Set Identifier (SSID) is the network name being broadcasted by your TP-Link wireless router. If the Problem is caused by your laptop, please call the support of your laptop. If you have connected to various wireless networks before, your computer may have problems connecting wirelessly, especially when the wireless network name (SSID) is the same with the previous ones you have connected to.
Select Properties once you locate the wireless network causing the error.