This driver is stable but lacks any performance patches from later Windows versions.
If your manufacturer no longer hosts the file, version 10.0.0.67 is a widely used stable release available on third-party sites like Softpedia . How to Install the Driver on Windows 7 64-bit Atheros AR9283/AR9285 Wireless LAN Driver - Lenovo Support atheros ar9285 driver windows 7 64 bit
: Version available released around June 2010, approximately 5.12 MB. It is explicitly compatible with Windows 7 (64-bit). Lenovo Support Download Page This driver is stable but lacks any performance