We have performed a quick test of Resolve 9.0.3 on our Windows 8 PRO 64-bit setup. Resolve is running fine with no issues encountered.
For customers upgrading their machines from an earlier version of Windows to Windows 8, please be sure to reinstall the app to avoid any issues. As it is always safe, perform a backup of your database before upgrading your system.
All customers please install the latest Windows 8 Nvidia drivers for your CUDA graphics cards.