Re: Sims 3 pc install

@crim1396  How old is the base game disc?  You can find the year at least by checking the copyright date in the fine print on the back of the case; the newer versions also have an Origin logo somewhere.  The point is, any disc manufactured after September 2012 requires Origin to be present and manage the install process, although you can avoid Origin with the older ones.

If you have a newer base game disc, then the only solution may be to find an older disc somewhere, one that won't require Origin.  Even if you bought a digital copy, you might not be able to install your packs without registering them.  Origin is kind of hit or miss on this point—some people manage to install packs that aren't registered to their accounts, while others can't or find that the packs won't load.  The same is true of the base game, but it sounds like you've already tried to install it and haven't been able to do so.

If your disc is older, then just uninstall Origin and try to install Sims 3 again.  When asked, decline the offer to let the EA Download Manager control your install, and you should be fine.