i need help with lag

hi guys im new here and this is my first time using windows 10 but my sims 2 is really slow and laggy even in build and buy mode i love the sims 2 with all my heart when im stressed out i turn to the sims for my fun but i really need help plzzzz help me i wanna play and make wonderful familys ive tried every single thing im not much of a computer person can y'all help me it even lags when i switch to a different sim....