Hi,
One of our computers is having the same issue as this below post but with custom shaders. Shader is not supported on this GPU.
These shaders work on all other computers with the same graphics cards. This computer just reinstalled unity. Thoughts on what could cause this?
just guessing,
Both have exactly same unity version?
Same target platform selected and same editor graphic emulation settings?
Yessir. 
which shader is that, or its all of them? i have gtx970 on this pc, would be interesting to test…
deleting Library/ folder is one option to try also…
It’s a bunch of shaders. I’m debugging across the internet with one of my artists. I now think it might be totally unrelated to the shader though. We just discovered she has some dupe files I think her svn got screwy and we are just getting a bad error that is hiding the real errors.
I’ll update once she has cleaned her tree of the dupe files.