Dear @Tan!
I’m having a similar problem (see this other thread http://discourse.psychopy.org/t/windows-error-pythonw-exe-has-stopped-working-please-help/1388) and wanted to try out your suggestion with changing the order in the Psychopy preferences to chose pygame over pyo. Also in my case (PsychoPy version 1.84.2 Standalone on Win7) pygame is not yet installed, and I’m having trouble understanding how you installed that - to which Scripts folder (there are several…) did you copy the file? And how do you install something using the command window (where do I find the command window)? I’m sorry, I am not very experienced with all of this yet… I am using the builder view, and am inexperienced with coding!
Thank you!
Raina