I need your help again. One specific user cannot login the domain's wifi network on his laptop (Lenovo Thinkpad) that uses the PEAP authenticaiton since this week. Other users can get connected to the wifi network and the user account in question also can do the same on spare laptops so I'm assuming the issue is not with the AP or the RADIUS server handling the wifi authentication.
The OS is Windows XP and the credentials to login the wifi is used the same one as login to the domain network. I have updated the wifi's device driver (INTEL WiFi 5100 AGN) to the latest one and deleted the PEAP credential cashe following the article in http://support.microsoft.com/kb/823731/en-us
, and also applied the gpupdate /force while the LAN cable is connected but nothing mentioned fixed the issue.
It seems the system is attempting to connect to the wifi but the warning message "the account has failed to logon the wireless network" repeatedly appears and eventually the apptept fails - as I mentioned earlier the account should work as it was able to connect the same network on other workstations.
The bizzare thing is other account is also rejected by the same message when trying to connect it on the user's laptop, the whole wifi related settings are the same to other machines so the only difference I think is the host name and the model of wifi adapter. The laptops are all put together under the same OU. There's apparently something wrong with the user's laptop but I'm not a wifi oriented and would like to have your suggestions to tackle the issue.