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.
1. Make sure you have installed Java, Eclipse and OpenSTM32 with correct bittness: check the properties on "My Computer" to see if you have 32-bit or 64-bit Windows and then install the correct versions of software.
2. Try to temporarly disable Antivirus software and try again