I had to manually uninnstall origin and reinstall the version on the internet. Did you try that? You can check on EA site help they have the steps.
this worked for me as well when origin wouldn't open after i DLed the newest origin patch. try also to move your my documents/electronic arts/sim 4 folder to the desktop. if this works you can move old files to new but test for problems.
Comments
Have you perhaps deactivated the "Enable Origin in-game" setting?
This is a link to information about it. There should be a tick in the box
http://sims4.crinrict.com/en/2014/09/deactivate-origin-in-game/
http://forums.thesims.com/en_US/discussion/817478/hello-come-and-introduce-yourself
http://tinyurl.com/OneRoomOneWeek
http://tinyurl.com/rosemow
My Showcase thread https://forums.thesims.com/en_US/discussion/948861/rosemow-s-rooms-showcase
Gallery ID: Gaia Puma (Click pic above if you would to download that exact building)
http://forums.thesims.com/en_US/discussion/789742/the-sims-4-create-a-world-petition-212-signatures-200-signature-celebration/p1
this worked for me as well when origin wouldn't open after i DLed the newest origin patch. try also to move your my documents/electronic arts/sim 4 folder to the desktop. if this works you can move old files to new but test for problems.