I have a network with several hundred laptops, I have mostly XP machines that are all working fine. Recently I have rolled out 2 new models of laptop (80 or so) running Win 7 Pro, everything works fine after imaging I run a gpupdate, policies come down without errors and everthing is fine.
After what seems like random periods of time, the Win 7 laptops (always a few, but never all of them) stop logging on users and I get the error: "There are currently no servers availiable to service the logon request"
So I go into the logs on the laptops, I see connectivity failures, at this stage it's worth pointing out that one type of laptop has an Intel Wifi adapter and the other an Atheros, one is a HP and the other a Lenovo and none of the laptops have virtually any hardware in common. Our wireless is a managed CISCO solution and does not experience any issues at the time. There are often XP machines (same type of laptops) along side the Windows 7 ones and they are working away fine.
When the connectivity issue occurs on the Windows 7 client it does not recover and we then have to do a gpupdate over a LAN cable, the policies are again applied (no errors) and after a reboot the wireless is back and working and users can logon fine.
I have tried many things that I have read on the web without success, I'll give you a short list of what I've have tried:
-I have updated drivers
-I have the latest Windows 7 updates
-IPv6 is now turned off
-WINS is now off too (don't need it anyway) -GpNetworkStartTimeoutPolicyValue
added @ a delay of 60 seconds.
-Local printer installed instead of network GP install incase of dodgy Windows 7 printer driver
-Disable Microsoft virtual Wifi (in device manager)
-Power saving turned off
-disabled and re-enabled the adapter
-changed network types from WPA2 to a WPA-PSK and manually specified key on client, connectivity still fails and client forgets key.
I have also tried the usual restarts etc... and am fast running out of idea's, so I'm really hopeful someone might have some suggestions?
Any help would be very appriciated..