We have a laptop cart of 30 Dell Latitude E5570 and we have been getting reports of the Wireless stops working on them.
Basically when the machines shuts down at night, the next day when kids go to log in they get the error "No Logon Servers Available". Its like the Wireless card turns off and wont start up automatically, but when i log into the machine with the local administrator account it then will get a lease and starts working again.
Does anyone have any ideas or have heard about this issue in the past? I am running Windows 7 on these laptops. 
Thanks for any help.