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Windows Live Messenger may not be repaired during the reinstallation of Messenger
Article ID: 944444 - View products that this article applies to.
You receive a message that states that you should reinstall Windows Live Messenger 8.5 because some .dll files or other required files are "bad" or missing (unlinked). But after you reinstall Windows Live Messenger and restart the computer, you receive the same message and Windows Live Messenger still does not start.
When you ran the Setup program to reinstall Windows Live Messenger, the repair function was not triggered. Therefore, the missing .dll files or other required files were not re-created.
To resolve this issue, you must repair Windows Live Messenger. To do this, follow the steps for your operating system: