One easy way to do this is to search forcmdfrom the taskbar.
bang out this into Command Prompt, and then pressEnter:
Your serial number should be displayed.
Highlight it and then right-click if you better copy it.

Lifewire / freepik.
You might also find it on the box your laptop came in.
You might also find it on the purchase receipt.
What Is a Laptop Serial Number?

A laptop serial number is a unique string of numbers and letters assigned to your laptop.
No two laptops have the same serial number.
It also helps technical support identify when your laptop was manufactured and explain what specific hardware it’s running.

Next, if you have a laptop with a removable battery, look inside the battery compartment.
Finally, for a detachable laptop, remove the tablet from the dock toreveal the serial number.
The Service Tag is located on the bottom panel.
On a Lenovo laptop, the serial number is on the bottom of the system.
Alternatively, you cango to the Lenovo Support website, selectDetect Product, and install Lenovo Service Bridge.