Be sure you installed the motherboard drivers (do not use Microsoft drivers or it's driver check buttons.)
If it fails, ask the supplier what parts they want to exchange.
I have a desktop computer that I built. I have a TP-LINK PCI wireless adapter and I'm running Windows 7 SP 1. SOMETIMES, when I boot the computer or wake it from S3 sleep, Windows does not recognize the network adapter. It's not listed in the device manager. Shutting down the computer and flipping the switch on the power supply to cut power to the motherboard, then powering up again, the computer will recognize the network adapter without a problem.
What confuses me is why this only happens SOMETIMES. Sometimes when I wake or boot, there is no problem.
Motherboard:ECS P67H2-A2 SLI (B3) R
Processor: INTEL CORE I7 2600 Sandy Bridge 3.4G
Network Adapter: TP-LINK TL-WN851N