Invoking Photoshop [2015.5/2017] 0xc000007b, But Works Via Lightroom 2015.5

I am running Win7. When I attempt to invoke Photoshop 2017 (and before that, 2015.5), I get the ugly Application Error (0cx000007b) message. But when I do an 'Edit in Photoshop 2017' from Lightroom 2015.5 it works as advertised. I have tried deleting the C++ Runtimes and reinstalling without effect. I have run the 'sfc' program.