The thread I linked mentioned 8.5 and onward caused problems.
http://www.filehippo.com/download_origin/history/
Has an archive from 8.3 and up. Good luck!
What have you tried?
First steps would be to wait a few moments and try again.
Perhaps a reboot.
Do you have any networking diagnostics tools?
Task Manager has a rudimentary one, you can have that running and click on the Networking tab, start the download and watch for spikes in Bandwidth. That would give you a clue on how far you are going.
This thread seems to have solved it:
Basically, use an older version of Origin to download the DLC.
I tried several approaches:
1) Restarted Origin several times
2) Rebooted
3) Reinstalled Origin
4) Added Origin in antivirus\firewall exceptions
5) Deleted the game
Only the last one showed some results: I managed to get Earth DLC installed but now the problem moved to Extended Cut, Leviathan and Resurgence DLCs.
As for the network activity, I looked it up into the Process Explorer, and it seems that when I push the download button Origin opens TCP/IP connection (or two) and after that shows no activity.
Could you please advise where it is possible to download earlier Origin version?
The thread I linked mentioned 8.5 and onward caused problems.
http://www.filehippo.com/download_origin/history/
Has an archive from 8.3 and up. Good luck!
