MSN (Windows Live Messenger) cannot save logon records. MSN cannot log on automatically. You need to re-enter the user name and password each time you start the system.

Problem: After selecting to record the user name, you still need to re-enter the user each time you start the system.

Solution:

I 've found the answer to this annoying problem @ http://messengergeek.spaces.live.com/blog/cns! E3785b1281bbda1! 2883. entry, the culprit Yahoo! Toolbar.

Warning:The AutoFix download available there is only for English (language) windows, using the download for other versions may break comprehenations for other programs such as Firefox. for other language you have to do it manually, following the solution Adam proposes:

Adam wrote:

You don't actually need to install this app everybody keeps downloading... all you need to do is change a registry value.

After hours of messing around und with regedit + Yahoo Messenger + Microsoft's Virtual pc I 've found the problem and a solution to why apps like MSN Messenger suddenly can't remember their passwords anymore.

When Yahoo toolbar gets installed it sets the following registry value:

[HKEY_USERS/S-1-5-21-796845957-926492609-725345543-1003/software/Microsoft/Windows/CurrentVersion/Explorer/User Shell Folders]
Appdata = % appdata %

The problem here is appdata shoshould actually be the following

Appdata = % USERPROFILE %/Application Data

So when MSN or other apps that use that registry key go to save their data it gets lost.

So the solution is simple, Run regedit and go

[HKEY_USERS/S-1-5-21-796845957-926492609-725345543-1003/software/Microsoft/Windows/CurrentVersion/Explorer/User Shell Folders]

And set the value appdata to a data value of % USERPROFILE %/Application Data

But insteadApplication DataYou have to use the expression used in your language, for example in Spanish it isDatos de programa.

I hope this fixes this mess

PS. I'm not going to install Yahoo! Toolbar anymore, first it messed up my right click in Firefox and then this. Not worth it.

 

Reference: http://social.msdn.microsoft.com/Forums/en-US/wlmessengerdev/thread/ea3ad81b-79c2-4f22-aa40-b4fb9e729708

Http://forums.techarena.in/windows-software/1110829.htm