The Gigabyte Z77X-UD5H WB comes with a Wireless Adapter/Bluetooth PCIe card.
Atheros AR5BWB222. Gigabyte calls it a GC-WB300D
is being reported as having an issue by a splat in device manager with the following message: Windows cannot verify the digital signature for the drivers required for this device. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source. (Code 52). The Card works fine in another system that also runs Windows 7 x64 Pro.
I have called Gigabyte, uninstalled and the reverse in safe mode also. Done everything I know. Why it works in one system and not this one is the key. Once it was seen to work on another system Gigabyte tossed me into the ditch.
I have tried drivers from the boxed CD and their site.
The Bluetooth side of the card which uses its own drivers is OK.
Windows 7 X64 Pro SP1
Gigabyte Z77X-UD5H WB
Kingston 16GB 2133 Genesis RAM
Corsair 750Watt Pro Series
Sapphire 6850 GPU