PWN Multimedia Encyclopaedia PWN 2009 from Empik - how do I retrieve the serial number?

Hi, I'm Mariusz.
I have a problem, because I once bought a CD with the programme Encyklopedia Multimedialna PWN 2009 in Empik. I installed it on my computer, which broke down. As fate would have it, I lost the card with the serial number somewhere. To install the program on a new computer, this serial number is indispensable. Could someone please provide me with this serial number on this forum? Sincerely. Mariusz.
AI: Do you still have the original disc, box or any proof of purchase from Empik (receipt, invoice, order confirmation)?
I have the original disc
AI: Have you tried contacting PWN or Empik about getting the serial number back? If so, what have they replied to you?
They wrote that they no longer have it.

RetryParity wrote:

They wrote that they no longer have.

RetryParity wrote:

. Fate would have it that I lost a piece of paper with a serial number somewhere

Writing on cards? For future reference, write on the plastic on the board with a writing marker!

RetryParity wrote:

I installed on a computer that broke.

What is the fate, of this broken computer? Do you physically own it?
You could possibly post an announcement that you need to buy, possibly make a swap for another item, this installation key.

In what sense did the computer break down? Did the hardware or the operating system break? If you still have an old computer and have not reinstalled the operating system then you could try to repair this operating system. It might be possible to recover the installation number of this encyclopaedia stored in the system registry. Here, however, it is not certain that it is stored in an explicit form in the system registry. It could be "another file", stored "somewhere" on the disk.

The value of this is max. 20 zł.
If, for £20, someone will search the registers, I am full of admiration.