@Keiomestre, @Mizzila1297
I think I found the solution for my game. Not sure this will be a good solution for other simmers though. I've been having, 'compatibility mode' alert on origin every time I start Origin. I asked my spouse and he solved all issues I had on Origin and the lagging in the sims 3. He opened the compatibility mode menu by right cliking the Origin shortcut, and clicked 'Change High DPI Setting', then disabled 'overrides highDPI scaling behaviour. Then, what happened is that I'm able to disable 'You are currently in Windows compatibility mode' alert while starting Origin, the few lag has gone on live mode when the game started, and the lagging in build/buy mode has gone. But only one bad thing I got after this. Before disabling high DPI setting thing, the game graphics was much higher and sharper but now a bit more blurry.
