Question Toshiba Satellite Pro L300-EZ1522

[atexit8]

I bought a used Toshiba Satellite Pro L300-EZ1522 laptop on eBay without doing due diligence.
I looked on Dynabook.com using the serial number for the laptop, but I came up empty.
I am guessing that the semi-legible Windows key on the bottom of the laptop is either Windows XP or Vista.

serial number : 89307066Q

Any ideas where else I can look?

 

[TommyTwoTone66]

What are you looking for? A windows XP product key? Why do you want that?

You can buy a legit windows 10 key on eBay for about $5