(Windows 10, Sims 2) University won't install/update.

Hello everyone.

I recently (re)purchased The Sims 2 and tried to install it, but when I try to install University it says it will check to make sure the installation is up to date. *Please note I am using regular 'ol The Sims 2, NOT Double Deluxe or the Ultimate Collection.* So, it says to insert disk number 4, and I do. It updates normally and then says that the update has failed, and then installation terminates. I'm using a Windows 10 computer, fully updated. Any help would be appreciated. Thank you.