Zend certified PHP/Magento developer

I have Skype installed, but not launched, on my Chromebook. And yet it tries to answer phone calls. Is there a way to make it stop?

I have my personal Chromebook open on my desk, next to my work Mac, for a project. It has Skype installed, so that if I am away from the office for an extended period, and connected to WiFi that doesn’t block it, I can call and be called. But I certainly don’t want it trying to answer Skype when it’s in my office, sitting next to my work Macintosh; under those conditions, all Skype traffic should be going through the Mac.

And yet, when a call comes in, it very clearly is trying to answer. Even though Skype isn’t open.

Can something be done about this?