Siemens does not provide a simple "setup.exe" for the USB A2 on Windows XP. Instead, the driver is bundled inside installation or SIMATIC PC Adapter Software package. However, if you only need the driver (not the full software suite), you must extract the INF files manually.
Last updated: 2025. Information applies to Siemens Driver Version 1.20 through 1.30 for Windows XP Embedded/POSReady/Pro.