Zephyr Workbench, a VSCode extension to manage Zephyr on STM32.
It enables users to easily create, develop, and debug Zephyr applications.
Main features:
Install host dependencies.
Import toolchain and SDK.
Create, configure, build and manage apps.
Debug STM32.
You can directly download it from the VSCode marketplace
For more details, visit the Zephyr Workbench
Finally resolved after weeks of searching various forum.....this is Dell Support Assist/Agent.
After I uninstalled from Laptop, comm error not show up after an hour of running the STlink debugger.
No idea what Dell program doing in the background.