I had an issue starting Daz Studio 4.9 (beta) on an older laptop running intel mobile chipset drivers. DS has always worked fine for me under Windows 7, but after updating to Windows 10, I discovered that it had downgraded my OpenGL version from 2.* to 1.1 (DS requires 1.3 minimum). Neither Windows nor Intel are planning to update these drivers, and the old ones (from the manufacturer) won't install on Windows 10 by default. :|

The good news is that it's fixable without having to roll back / buy a new computer (which I plan to do anyway), and the following guide worked for me: http://pattispathways.com/2013/07/06/finally-a-fix-for-windows-8-opengl-error/

Sorry to necro-bump this thread, but hopefully this helps if anyone else runs into the same issue.