Sims 3: Pets- Automatic Minimize during start up & crash directly after fully loading.[SOLVED]

:newfag:

Title basically explains it all. I start it up, it minimizes. When I maximize that it loads fine, but crashes as soon as the load bar fills.
All help is loved and graciously thanked.

//MOVED
Hello,

A familiar problem. Do you have any Mods or Custom Content?

Yeah, so should I get rid of it? or reinstall it.

Hello,

Just back them up and then remove them, yes.
Let us know the result afterwards, please.

Sorry, but that didn't help at all. It's still the same thing happening.

//EDIT

I've done that and uninstalled it from my game via game launcher, too.
Also, now I'm getting the 'unofficial game modification' error.

Hello,

Please re-do step 2 to 5 from this page: https://games4theworld.forumotion.com/t1171-must-read-how-to-install-the-sims-3-correctly

That worked perfectly! Thank you so much!