Stm32cubeide download for windows
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STM32CubeIDE is available for Windows, macOS, and Linux, with a version specific for Debian/Ubuntu, Fedora and a more general installer for the other distributions. ST will continue to update it by including additional STM32Cube software within STM32CubeIDE.
This is known as Windows SmartScreen which shows a warning when installing or running unsigned executables. You can easily turn of this feature but Microsoft doesn't recommend it. If you don't want your users seeing this warning anymore, you need to sign your executable with a certificate provided by a CA that's trusted by Windows.