These drivers are not available for Windows 10 just yet. I have accessed their official website, and only the following Windows versions are available: Windows XP, Server 2003, Vista, 7, 8, and 8.1.
The only way to acquire information about this is to contact the developers: https://www.silabs.com/products/mcu/Pages/USBtoUARTBridgeVCPDrivers.aspx
Note: you need an active account in order to contact them.
