On STLINK-V3PWR, upgrade the firmware to the version V4J7B3P6. The several ST-LINK coexisting versions result from the incremental addition of new functionalities over time, starting from the first ST-LINK/V1 version. The first two versions of ST-LINK are both. Which driver are you using for the V1 on windows 7 64, I never got mine to work and gave up and bought a V2. ST links are a few dollars each, hardly worth the efforts to fix. ST-LINK board firmware upgrade. I can see that we can upgrade the st-link firmware for STM32 boards via STM32CubeProgrammer, ST-LINK Utility or STSW-Link007 tool. But I have observed that this will always pick up the latest version which is available. Additionally, I assume you have a genuine ST-Link V2.