We all love The Sims 3 the gameplay, the customization, the amount of content is so massive that everyone has something to do. PLEASE, BACK UP EVERYTHING THAT YOU MODIFY, SO YOU CAN ROLL BACK IN CASE AN ISSUE POPS UP! PLEASE NOTE THAT, IN THIS POST, I WILL GO OVER FIXES THAT WORKED FOR ME AND LET ME PLAY THE SIMS 3 WITH LITTLE TO NO LAG! I OWN ALL PACKS AND ALMOST ALL STORE CONTENT, ALONG WITH A DECENT AMOUNT OF CC/MODS, AND MY GAME ALMOST NEVER LAGS, EVEN ON HIGH SETTINGS.