I'm seeing the same problem running the same dowloaded 3.5 32 bit and 64 bit binary on my laptop but not my desktop. After reading around a bit, I found a developer thread that talks about older graphics hardware not being compatible with DX11 and it mentions that the source should be recompiled for the older 10.1 feature set. (URL shortened for brevity: shorturl.at/bwFT9 ) After running DXDIAG, I see that my laptop is configured for DX12. Most confusing. Both the laptop and the desktop are running...