Thread:Mapelle/@comment-27660183-20160312070818

I'm guessing this is what's happening with your Skype.

Try these:

http://www.cnet.com/how-to/how-to-disable-ads-in-skype

https://support.microsoft.com/en-us/kb/3089023

If those don't work try a system restore. Make sure to disable antivirus before starting system restore as those can interfere. 