Development tools for Zephyr on STM32Workbench for Zephyr: VS Code extension to set up, build, flash and debug Zephyr applications on STM32.Devicetree manager: browse, edit and visualize Zephyr devicetree, STM32CubeMX-like for Zephyr.
Currently i am using windows 10 but before upgrade to windows 10, on windows 8.1 i had the same problem.
I am using 64 bit windows. I installed System workbench from Eclipse Luna 4.4.2.