Run the installer on Windows 7. If you encounter errors with older versions (like MSN 7.5), you may need to right-click the shortcut, select Properties , and set Compatibility Mode to "Windows 2000" or "Windows XP".
Official support for MSN Messenger (later Windows Live Messenger) has ended, but you can still run classic versions on Windows 7 through community-run revival services. Current Status of MSN Messenger
Visit Escargot's Download Page to get a "pre-patched" version of the messenger. These versions are modified to connect to Escargot instead of Microsoft's defunct servers.
To use Messenger today, you must use a third-party server like Escargot , which emulates the original Microsoft servers.