I need to update, but it's already updated

Have you tried clearing the Origin cache? Sometimes updates and downloads will leave corrupt data in there, and it can ruin your day.

1. Completely log out and close down Origin

2. Open Computer, and then the (C: ) drive

3. Open ProgramData (usually a hidden folder, but you can enable it by going to your control panel and adjusting your folder options)

4. Right-click and delete the Origin folder entirely (you may have to open the AppData folder to find it on a Windows 8)

5. Empty your Recycle Bin

6. Log back into Origin.

Let me know how it goes! Another option may be to clear your Temp folder: http://help.ea.com/en/article/clearing-your-temporary-files/