I am sorry for the trouble. I wonder if you have any other application intended to control WiFi connectivity. There is the possibility to use Intel® Proset Wireless Connection Utility and see if the WiFi can be turned on that way; furthermore, you can run the Manual Diagnostics Tool.
You may also want to consider updating your system BIOS or contacting the motherboard manufacturer for further assistance and compatibility information. We also have to bear in mind that the installation of these adapters is subject to local regulatory approvals.
No other applications are installed to manage WiFi.
Same result using the Intel Proset Wireless Connection Utility. It indicates the hardware switch for wireless is Off. This is a desktop system with no hardware switch for wireless. The Intel Manual Diagnostics Tool also just reports that the radio is off.
Status Update: Motherboard BIOS update failed. The board has been replaced with the same make and model. The issue persists.
I don't have a spare space for a PCIe card; my only expansion slot is already occupied. The motherboard has a miniPCIe slot as well as 2 spaces in the IO shield for the antennae. It's clearly intended for a wireless adapter exactly like this one.