ASUS P5P41D Atheros AR8121/AR8113/AR8114 PCI-E Ethernet Controller driver v.1.0.0.37/1.0.0.43/1. for Windows 7 (32/64-bit), Vista (32/64-bit), XP (32/64-bit) free download
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Axence NetTools
Get Original Network Adapter MAC Adress - madshi.net
Download and install Atheros Atheros AR8121/AR8113/AR8114 PCI-E Ethernet Controller - driver id 2142039