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Make sure that Skype is no longer running.
Press the Windows and R keys on your keyboard at the same time.
Type %appdata%\skype into the Run window and click OK.
Find and delete the shared.xml file. If file extensions are not displayed on your computer, the file will just be called shared.
Open the folder that has your Skype name.
Locate and delete the config or config.xml file.
Press the Windows and R keys on your keyboard again.
Type %appdata% and click Enter.
Locate the Skype folder and rename it to Skype_old.
Uninstall Skype.
Download and install the latest version of Skype.
https://answers.microsoft.com/en-us/sky ... 923?auth=1