If like me you are sick of skype spamming you with constant ads try this out.
Unfortunately the forum won't let me add images.
For all windows versions XP and above type in your computers address bar
This will drop you into a directory with several files, one being called HOSTS.
Open the hosts file with notepad and you will be presented with a bulk of text starting with # marks.
Now after all the # marks add to the bottom of that file the following line
Now that is added it should refrence skypes ad server back to your local host no longer plaguing you with unwanted ad spam.