They could be those machines we know do that. I can't list all the make and models but dv6000's did this a lot. The fix often ends in a debate but those that deal with many makes and models know what's going on.
While changing the wifi card in the laptop cures it for awhile, those models only fail again later. There's a lesson in this.
I have a small network, about 35 computers.
There is 20 LAN PC computers (they use dns, active directory, dhcp), and there is 10 laptops. They connect on same D-Link wireless router( radius server authentication).
After most of laptops is operational(connected on wireless router and on domain ), same two laptops always disconnect, and they can't regain connection . All laptops also get their ip addresses through dhcp.
I tried all kind of wireless router configuration, I don't think it is dhcp or dns server problem, remote access policy is also very simple ...
So, does anyone has any idea
Thank you guys in advance