On a computer was a problem when logging on to the Windows Live Messenger. While logging on the following errorcode showed up "8E5E0152 - Login to the Windows Live Messenger has failed while the service is temporary unavailable. Please try again later".

The problems were caused bij an error in the contact map, that is the map where the contactinformation is saved. Please follow the next steps to get this problem (at least this one) out of the world. 

1. Close the Windows Live Messenger.
2. Make sure that hidden folders appear in your explorer (use the map options option in the control panel).
3. Delete all the maps in de map C:\users\<username>\AppData\Local\Microsoft\Windows Live
4. Try to login to the Windows Live Messenger and you will see... it works !

The real "die hards" will go further and put the deleted maps in reverse order back in a ultimate attempt to discover the map with the error (and save as much contact data as possible).