When you want to configure Skype, start Skype in the usual manner. Locate the top menu item – Tools. Click Tools, from the drop down menu that appears click – Options.
On click of the menu item – Options the Skype configuration window opens up.
The General setting section in the right hand side consists of a number of check boxes. Their functionality is explained briefly below.
If you want to know how to do this step-by-step then click this link.