I get an error when I try installing the game that reads: DirectX Setup Error: The cabinet (.cab) file is not signed.

You can try to reinstall DirectX. DirectX is available in the Game Folder.

By default the folder is located here :

• C:\Program Files (x86)\Origin Games\Need for Speed(TM) Rivals\__Installer\directx\redist

Once you hav opened the redist folder, sort the list by type so you can easily find DXSETUP.

This is an application - Double-click in order to reinstall Directx and restart the computer. 

Ok I tried that, and this time I got a new error reading:

"A cabinet file necessary for installation cannot be trusted. Please verify the Cryptographic Service are enabled and the cabinet file certificate is valid."