[Airu]

I think I know what happened.. This almost happened to a friend of mine. She had a 'urgent call' on skype. But she didn't answer or respond to it. She blocked it.
I think some people have found a way to use skype calls to give viruses and stuff. I dunno for sure.

What I told my friend to do also is to go into skype setting and change it so only friend can call and send you messages. And she has not gotten anything like that again. I believe it's under skype options some place where that option is. I don't have skype on me currently so I can't give you the exact place where that is at.
I hope this helps. :3

I do believe skype is safe if you keep to just calling and answering thing you do know is safe. I've never had a problem with skype myself.