I have a user reporting a PC is "loosing connection to the wifi throughout the day".  Checking the AP, I see a failed connection in the event log during the authentication stage with the reason:
 
reason='eapol_timeout' radio='0' vap='0' channel='11' rssi='62'
 
 
This is an HP mini PC using a USB wireless adapter (AC) with a Realtek driver.  The PC is in the same classroom as the MR46.  We have the same PC / AP combination in about 15 classrooms.
 
I have:
*  swapped the USB wireless adapter between another PC that isn't having reported issues
*  updated driver via Windows update
 
I updated the MR46 firmware to  27.7.1 today to see if that will help.  Issue stays with PC.  Other than re-imaging the PC, what are some other suggestions?