Windows Live Messenger 2009 Single Sign On
![](https://webeasy4u.com/wp-content/uploads/2023/04/windows-live-messenger-2009-single-sign-on.jpg)
With the Msn version update, old versions have become inoperable. For those who have upgraded to Windows Live Messenger 2009, they can’t log in single-login, because either they couldn’t find the right patch or a crack hasn’t been written for…