Can’t OPEN! WON’T FINISH DOWNLOAD!

So I brought this for my sister with all my money and when it says “Verifying”, after that it says “the sims 2 is damaged and can’t open, try redownloading it.
SUCH A PAIN IN THE BUTT.

B0SSman66 about The Sims™ 2: Super Collection, v1.2.3