Error Code 00000008:ffffffffffffffff

@TheSaturday6  That's not unusual: Windows Defender usually disables itself when it detects a third-party antivirus, since having two security programs running side by side can do more harm than good.  (That doesn't always happen, hence the need to check.)  I haven't heard from anyone else who uses ESET, but then not everyone has listed their antivirus yet.

The only other suggestion I have at the moment is to try using your phone as a mobile hotspot.  (Make sure it's using data, not your home wifi.)  The point is to try a different network just in case there's something about your current network that's not getting along with the SDX downloads.  That would be odd considering that Origin connects without issues, but it's easy enough to try.  If you happen to have a desktop without built-in wifi, I don't think it's worth buying a separate wifi card; this is more of a long shot.