Apparently, there have been many service users have reported a bug to Microsoft about a problem when trying to log on with their respective features the following:
The Windows Live Messenger Beta is temporarily unavailable. For favaor, try again later. Error Code: 80010100.
Microsoft has posted some steps to address these problems.
1 .- To ensure that both msnmsgr.exe as wlcomm.exe are completely disabled.
2 .- Microsoft Configuration Change Windows Explorer.
3 .- Delete the contacts folder of Windows Live.
4 .- Check that the date and time on the computer are correct. 5 .- Look
that is enabled through the firewall. 6 .-
Uncheck the option "Check for server certificate revocation in Internet Explorer." found in the browser.
7 .- Restart the computer and log on again.