“… 810003c1: We were unable to sign you in to the .NET Messenger Service”. Are you receivng error 810003c1 while trying to login into Windows Live Messenger IM? If so, then there is no possible solution to this issue as of now. Why? continue reading to know the reason for this error:
“… Microsoft has shut off the Windows Live Messenger IM for users in the countries embargoed by the US hence Microsoft no longer offers Windows Live Service in your country.” This includes countries: Cuba, Syria, Iran, Sudan and North Korea. source
