Starting today I can't sign into Windows Live Messenger.  I have 3 ID's and can't sign in with any of them.  I can use the Web messenger through my Hotmail accounts, but can't sign into Messenger.  I get the error code 81000490 and I have followed every direction in this forum and I'm still unable to sign in.  I've installed and uninstalled several times and it still doesn't work.  In some of the directions the options I'm supposed to be looking for don't even exist.  I have Windows 7 Pro and the version of Windows Live Essential is 16.4.3503.728.  I'm not being blocked by a firewall and I'm not being blocked by my Antivirus software. Often when I try to sign in none of the links work.  I have internet connection.  The only messages I get are that I'm not connected  to MSN and that error code.  I need help please, I'm pulling my hair out here.

Thanks, Lauren