Signing to Windows Live Messenger failed because the service is temporarily unavailable. Please try again later.
Error code 800488fa
This is one of the stupid error messages that only experienced people can troubleshoot because the error message has nothing to do with a down service.
Apparently you are getting this message because the account that you created in windows live has not been activated. Once you activate the account everything should work.
Now why don’t we just get the freaking proper error message?