Hi! If you're running Altus on Windows and update to Microsoft's Windows 10 Creators Update, please note that GPU support may stop working.
This is because Creators Update replaces your vendor (i.e. from NVIDIA or AMD) drivers with ones certified by Microsoft, which do not have CUDA or OpenCL support.
There are various reports of this popping up around the Internet:
To fix this, please reinstall your video drivers after updating Windows.