Before diving into the software, it helps to understand the device. The AR5B22 is a Wireless Network Adapter originally manufactured by Atheros Communications (which was later acquired by Qualcomm). It supports the 802.11 a/b/g/n standards on both the 2.4GHz and 5GHz bands, making it a surprisingly capable card for its age.
Microsoft dropped native support for the hardware ID string PCI\VEN_168C&DEV_0034 in later updates. Windows 7 64-bit ships with a driver that works, but it is notoriously unstable, dropping connection every few minutes. Atheros Ar5b22 Driver Windows 7 64-bit