March 2017
Origin Error reporter says "Please check your internet connection and try again." Firewall is down, internet connection is fine.
March 2017 - last edited March 2017
Does anything listed here help?
http://answers.ea.com/t5/Technical-Issues/HOW-TO-Fixing-Origin-Login-Unavailable/td-p/3218195
http://answers.ea.com/t5/Technical-Issues/Complete-Support-Origin-Connection-Issues/td-p/5019298
Namely things like Origin Cache, Hosts file, IE settings, Proxy, Antivirus. Nothing silly running like Peer Block program?