This is a newly set up SBS2011 install. Three wireless laptop clients, two mid-performance Lenovos and one ASUS high-performance gaming laptop. After joining the laptops to the domain, the two Lenovos seem to be fine. They pause for under a minute at the Please wait message just before you get the CTRL+ALT+DEL to log on message. The ASUS hangs there for 5-7 minutes. Using msconfig, I disabled ALL NON-MS services, same problem. Then I did a diagnostic startup, essential services only. When I did that, the ASUS got to the logon prompt in several seconds. This leads me to believe that the problem is with one of the MS services. But where to start??? There are dozens of them. Need help with this one. Thanks.
I would look in your WiFi NIC settings on the ASUS and see if there is a way to get pre-authentication setup.