Well this site doesn't host the installer.
http://msgpluslive.net would be the official website to get the installer. Or a trusted mirror.
Which version of Windows are you running? Please note that this is more of a coincidence then Messenger Plus! Live causing this as it doesn't interfere with user accounts in any way.
Error message when you log on to a Windows Vista-based computer by using a temporary profile: "The User Profile Service failed the logon. User profile cannot be loaded"
The User Profile Service failed the logon. User profile cannot be loaded. - Vista Forums:
Based on that article your user account is broken. You will need to remove it.
DELETING YOUR USER PROFILE WILL DELETE ALL SETTINGS AND DOCUMENTS, MAKE SURE TO BACK THEM UP
Now what you can do is click Start, then in the search type CMD. Right click command prompt and click Run As Administrator.
In the command prompt window type
code:
net user administrator /active
You may need to type
code:
net user administrator /active:yes
Once you have the administrator account active then you will need to follow the steps in the article to remove the user account then create a new one.
Feel free to wait for someone elses opinion.
/ 
