Maintenance for the week of April 20:
• NA megaservers for patch maintenance – April 20, 3:00AM EDT (7:00 UTC) - 12:00PM EDT (16:00 UTC)
• EU megaservers for patch maintenance – April 20, 7:00 UTC (3:00AM EDT) - 17:00 UTC (12:00PM EDT)
The game's working fine for me, I logged in just a few minutes ago to check something, with no problems. The OP's problem was most likely Norton: it's the most user-unfriendly security software ever. I used to use it, but then uninstalled it, because it was causing more problems than the malware it was supposed to prevent.
PC(Steam) / EU / play from Melbourne, Australia / avg ping 390