..."We Can't sign you into to Windows Live Messenger * Your contact list is unavailable right now, please try again later" 24 hrs later, I still get this ERROR message after I have already tried the repair advice from the Community thread: Go to Control Panel > Add Remove Programs > Repair; I shut it down & Restarted but Live Messenger sign-in is STILL a No-Go! Why can't MS PLEASE fix this? I even got another error message after the 'repair' in attempting to sign-in again, stating that my IP address 'appears to be invalid' - huh? I clicked the option to 'Repair', which eliminated this error and tried signing in again-- but it only reverted back to the 1st Error Message :( "Your Contact list is unavailable right now...etc., etc!" --Very frustrating-- MicroSoft: PLEASE Remedy This Issue(s) ~ Thank You!!