Master Suite Install Origins Problem!!! HELP. [SOLVED]

I'm installing the G4TW Sims 3 Collection for a friend on his laptop. The laptop is an old Dell Latitude D620. There is enough room for all the sims games, but that's not the problem.

I've installed all the games up to "Pets". I've moved on to "Master Suite Stuff". Running the setup.exe then entering in the Product Key, the installer pauses at about 50% completion. It says I have to "Insert disk 1 which contains the file \Support\Origin\OriginSetup.exe"

The laptop already has origin installed on it. And yes, the latest version of it too.

Help?

While looking through the sims 3 folders. I see there is a "..\The Sims 3 - Pets\Support\Origin\OriginSetup.exe"

Investigating...

Fix it -_-

Sometimes... I do go full retard.