Re: Can I Install TS2 Ultimate Without Having To Uninstall Physical Copies?

I don't see why they shouldn't both work, as Origin saves the game in a separate folder, but this site says that maybe the older Sims version won't work anymore after installing the Ultimate Collection. Maybe there are some registry changes...but yeah, you can install it without having to remove the old version first.

As for your backup saves, they should also work, you probably just have to copy the neighborhood over into the new game folders. If that's not working, there's also a guide in that site I linked above.

I don't really understand what you mean with your last question, because the Origin client IS on your PC, but if you want to know if you can play the game without running Origin, then yes, you can, I just tried it.