Usually, serial numbers are available at the back of the computer on the sticker and we can use the Third-party or manufacturer software system to find the Product details. The product serial number can also be found using the BIOS utility or a script. There is time that the sticker is worn out or faded so you won’t able to see the product serial. Using this method below you will able to get the serial using this command.
You click start then type “Powershell” or type run then search for “Powershell”
Next type this command “Get-CimInstance Win32_BIOS” then the details of the computer will show including the Serial Number