How do I disable Skype when using outlook?

When I'm going through emails, I don't want Skype contacts to ring me.

How do I disable it while using outlook?

Can I disable Skype on one of my computers completely?

I only use Skype on my laptop, never on my desktop.

It's annoying when your Skype contacts ring you while you have Outlook open.

Sometimes I have a customer on the phone addressing issues in their email, or I contact someone from their contact info in an email.

It's distracting to receive a Skype call while you're on the phone with someone else.

I need to disable it.

I have gone to the settings in Outlook, People, Skydrive. There is no way to disable it.

Can someone help me with this issue?

Thanks!

Andrea Hana

SVE

Question about Outlook Express