[FAQ] Unable to connect with origin

Manually updating Origin AND Sims 3 seems to have fixed it for me. Don't trust either telling you they don't have any updates and download the updates yourself just to be sure. This may not help everyone having the issue, but it's worth trying.

For reference, I used the Super Patch and downloaded the Origin Installer from Origin's website (which updates it rather than installing it if you already have it). I think my problem is Origin was saying that it had updated, but then attempted doing so again every time I restarted and though Sims 3 didn't ask for an update, the version number listed was clearly the wrong one, so it had downloaded the update and then... did who knows what with it.