Right-click the broken device in Device Manager, choose Uninstall , unplug the adapter, install STEP 7 V5.5, reboot, and plug the adapter back in. Issue 2: Firmware Incompatibility
Because Siemens does not offer a standalone, single-file installer specifically named "PC Adapter USB A2 Driver for Windows XP," you must extract or install it via the Simatic device drivers package. Method 1: Installation via STEP 7 V5.5 Close all open automation applications. Insert your STEP 7 V5.5 SP3/SP4 installation media. Run the setup wizard and select a custom installation. Ensure the component is checked. Complete the installation and restart the operating system. Method 2: Manual Driver Extraction Simatic Pc Adapter Usb A2 Driver Windows Xp