The experience on Windows 11 is a classic "love-hate" relationship for developers. While technically streamlined, it often requires manual intervention to work correctly. The "It Just Works" Reality
Windows 11 enforces Memory Integrity (a hypervisor-protected code integrity feature) and stricter driver signing. Older unsigned or improperly signed STM32 drivers (pre-2019) will be blocked. Microsoft also deprecated the old serial.sys fallback mechanisms. Stm32 Virtual Com Port Driver Windows 11
If you are forced to use a legacy project with very old ST drivers: The experience on Windows 11 is a classic
Navigate to the folder where you extracted the driver files (e.g., the folder containing dpinst_amd64.exe ) and click . Older unsigned or improperly signed STM32 drivers (pre-2019)
Essentially, the STM32 VCP driver acts as a translator. It takes the USB data packets from the STM32 board and presents them to the Windows OS as a standard COM port.
"No driver," Elena sighed.
Elena extracted the zip file and ran VCP_V1.5.0_Setup.exe as Administrator (right-click → Run as administrator).