Messenger Reviver

Messenger Reviver automatically installs, repairs and/or modifies Windows Live Messenger as well as Windows Messenger to continue signing in despite being blocked by Microsoft. It supports modifying all language versions and can automatically install either 2009 or 2012 versions in 47 different languages. It will automatically attempt to detect if Messenger is still installed, which versions are eligible for modification and if you need to run a repair or new installation to bring Messenger back.

Requirements:

Microsoft .NET Framework 2.0