I got a Windows 8.1 workstation computer in the other day, sometimes when it was shutting down it would get an error message pop up saying:
AcStBmhE.exe
The application failed to start correctly 0xc0000142
I ended up tracking it down to a faulty NVidia Quadro driver.
To fix this just download the latest NVidia ODE driver which is the official driver for NVidia Quadro 600K(that is the GPU installed).
Make sure you download the driver from the official NVidia support site in the driver downloads section. http://www.nvidia.com/Download/index.aspx
Not sure if this fix will work for you but it did work for me.
