нет фреймворк переустанавливал?
Скачать Microsoft .NET Framework 4.5 с официального сайта Центра загрузок Microsoft
---------- Post added at 23:51 ---------- Previous post was at 23:42 ----------
а вообще гугол говорит что
Try this.
Exit Skype: From the system tray >> right click on the Skype icon and click "Quit"
Click Start >> Run Type: %programdata%\Skype\Apps
Rename the folder login to login1
Then go to Skype folder inside program files (x86) and go to phone folder and then right click on Skype application and select send to Desktop (Create shortcut)
Re-run skype using this new shortcut.