IMHO Intel ProSet is extremely user UNfriendly
After wasting hours fighting with it I switched to Windows Wireless Connection Manager and my problems have ended for good!
You need about 10 seconds to switch and end the suffering
Disabling the Intel PROSet Wireless Utility
Locate and right click on the Intel PROSET Wireless utility icon located at the lower right corner of your Windows Desktop.
Select Use Windows to manage WiFi on displayed on the menu options.