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Microsoft instant-messaging users who arent yet running version 8.1 (or higher) of Windows Live Messenger, take note: Your days are numbered.

"We will soon configure the service such that any user on Windows XP or later system has to use Windows Live Messenger 8.1. When a user using an older version of Messenger tries to login, the client will help the user with a mandatory upgrade to Messenger 8.1."

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