Emelyn702 When does the game crash? If it's before the Main Menu, please remove your saves folder from Documents > Electronic Arts > The Sims 4 and try again. If this works, you have a known issue:
Crashes on Mainmenu | EA Forums - 12139111
If that doesn't help, please provide a dxdiag. Click Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop. From there, you can attach it to a reply using the paper clip (Attachment) icon included with the other formatting buttons.