Since the "73" version you're looking for might refer to a specific driver version or internal build, the most reliable way to get this device working on a 64-bit system is to use the ZyDAS ZD1211B generic driver if the Airties installer fails. Download Compatible Drivers: You can find collected drivers on Driver Scape , which list specific 64-bit Wireless Adaptor versions for the Manual Installation via Device Manager: Plug in the Device Manager
: Ensure you click into the specific 64-bit directory (often named Vista64 or Win7_64 ) within the software bundle so Windows pulls the appropriate architecture files.