Stop Hangouts from ringing with Google Voice number.

[Google_Superuser]

I use google voice for my primary phone number. I use groove ip on my S4 GPE to answer and place calls. The problem is when I have my desktop computer on it also rings my desktop. Now I am currently looking for a job which means any phone call is quite exciting and in my exuberance to answer the call I have lost all logic and clicked answer on my desktop rather than my phone. This is bad because I don't have an active microphone. Is there a way to keep google voice from ringing through hangouts?