Why some BIOS have and some didn't have serial no?  

  1. EOF
    Posts : 85
    Win7 Ultimate

    Why some BIOS have and some didn't have serial no?

    Does somebody know why some BIOS have a serial number and why other dont have?

    On some system if I run the powershell command
    Get-WmiObject win32_bios | Format-List SerialNumber
    I get a serial number than on other I don't get a serial number or I get "System Serial Number" written.

    Why is this?
    How can I know before I buy a pc does it support serial number in BIOS or not?

    The serial number is very important when we integrate the pc to Azure...

    Thanks for any help and suggestion.
      My Computer

  2. Posts : 4,980
    Windows 11 Pro 64-bit

    Serial number or service tag is sent in BIOS for most machines. If you don’t see your PC’s serial number, blame your PC’s manufacturer. The number will only appear here if the PC manufacturer saved it to your computer’s BIOS or UEFI firmware.
      My Computer

  3. Posts : 13,136
    Win10 Version 21H2 Pro and Home, Win11 Pro and Home

    But there should always be a Serial Number somewhere on the computer's case, for Notebooks it may be in the battery compartment.
      My Computers

  4. EOF
    Posts : 85
    Win7 Ultimate
    Thread Starter

    I have several pc's with and without serials in the bios/uefi bios.
    I think uefi is just reading the serial from bios.
    Cos they are same.

    In my case a label with a serial on the pc case will not solve the problem.
    Cos software should see the serial...
      My Computer

  5. Posts : 14,920
    Windows 10 Home x64 Version 22H2 Build 19045.2965


    As FreeBooter explained, you need to take this issue up with your PC supplier.

    PC manufacturers generally enter a value in the serial number field of the Bios/Uefi and that serial number is also used as a reference for obtaining support.
    Refurbishers might remove it.

      My Computer


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