We've noticed that you are, or previously were, using an older version of Skype for Windows 7.17-7.30. This is a reminder to please update Skype for Windows as your version will be permanently retired, and after September 4, 2017 you will be unable to sign-in.
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Versions of Skype 7.17-7.30 for Windows will no longer be supported
Starting from September 4, 2017 versions of Skype 7.17-7.30 for Windows will no longer be supported and do not allow users to log in. To continue using Skype, you will need to install version 220.127.116.11 or newer.
Users who use older versions and are subscribed to Skype notifications received the following message: