I see.
I have an i7 2.60 GHz with 8GB RAM. I took a look using the process monitor and it looks like what you described: three worker threads for compiling shaders are spawned and that’s that. What did you end up doing to address the issue?
EDIT: Let it run for about 30 minutes and stepped away and at some point it ran into completion, which is strange because I had let it run for over an hour previously and it had stuck at 45%. Will try to reproduce. Thanks!