Never mind, I just found it.
What version of Premiere Elements are you trying to install?
Typically there are two installation discs in the boxed packaging - one for Windows and one for Mac.
Each of the discs is in its own envelope. Both envelopes are in a white box. Look for the label with the
serial number pasted on that white box.
Did you purchase the product from an authorized reseller?
Please review and consider and then we can discuss this further.
I did not see your message of success until after I posted my suggestions.
Best wishes with your Premiere Elements projects.