computer interrogation
I use belarc advisor( free download)
link
https://www.belarc.com/products_belarc_advisor
handy if your computer comes with a pre installed windows program such as W10.
It will give you the serial number of that and most products in your computer. well worth doing a hard copy for future reference
Frequently Asked Questions
Q: Will the Belarc Advisor send my PC profile information up to a web server?
No. The Belarc Advisor creates a local Web page, keeping your PC profile on your PC and does not send it to a web server, including Belarc’s server.
Belarc is able to personalize a web page to show you details of your computer without a web server by using technologies included in the Belarc Advisor.