I can provide a direct link to the latest stable version once I know your setup.
Official Manufacturer Portals: Always start by checking the documentation that came with your specific ST-EP4 board. Manufacturers often host dedicated ZIP files containing the latest INF and SYS files. st ep4 driver hot download
Locate the Hardware: Look for an "Unknown Device" or a "USB Serial Port" with a yellow exclamation mark. I can provide a direct link to the