If you are forced to use XP, . Siemens released version 3.0 of the USB A2 driver, but that version removed XP support entirely (min OS is Windows 7).
The Simatic PC Adapter USB A2 is a compact, USB-based communication adapter designed for use with Siemens' Simatic PLCs. It enables fast and reliable data transfer between the PLC and the computer, supporting various communication protocols, including MPI, Profibus, and USS. The adapter is widely used in industrial automation applications, such as manufacturing, process control, and building automation. Simatic Pc Adapter Usb A2 Driver Windows Xp