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WMIC UUID returns FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF

    Question

  • Dear all

    As far as most of our computers doesn't store serial number in BIOS I am looking for getting UUID from WMIC csproduct

    Unfortunately some machines returns invalid vallue FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF

    Can anyone explain why this is happening and how to work around it? For example force system to show correct UUID or set new UUID/SN to BIOS ?

    Many Thanks in advance.

     

    Wednesday, June 29, 2011 4:17 PM

Answers

All replies

  • Not all vendors supply a UUID.  It is optional.  It cannot be changed.

    This question can be better answered by contacting the vendor.

     


    jv
    Wednesday, June 29, 2011 4:39 PM
  • and how about serial number of bios or base board serial number? Could that one be changed?

    Wednesday, June 29, 2011 4:50 PM
  • i know there is a program to change the dell asset tag. not sure about the baseboard serial number
    Wednesday, June 29, 2011 5:18 PM
  • The asset tag can usually be changed but requires a vendor specific program to do it.

    The serial number is also under the control of the vendor.

    Why would anyone ever want to change these?

    They can be cahged by using a special executable file that can call certainlow level APIs.  Of course this is only true if the vendor uses ceration methods for sorting these in NVRAM.  It is also possible to burn them into ROM so they can't be changed.

    The processor and other chips on the motherboard can also have serial numbers.

    Think of this like a VIN number.  The only way to change a VIN is to grind it off and stamp a new one in or to chesel off the VIN tag and repalce it with another.   Of course with VINs this is a criminal act.

    It is very much hasrder to chisel a serial number of a chip.

    ;)

     

     


    jv
    Wednesday, June 29, 2011 5:52 PM
  • we had something just happen the other day where we had to change the dell asset tag.  We got a machine where the tag on the case was different than the asset number given in the bios.
    Wednesday, June 29, 2011 6:29 PM
  • we got several older computers in use and they are missing any sort of GUID. Bios SN, MB SN, asset tag, PC UUID... nothing

    I don't like the idea of MAC address like asset tag cos there could be several mac addresses present in one machine.

    Wednesday, June 29, 2011 6:44 PM
  • Asset tags are changeable by the user.  This is how you track inventory without using a serial number.  The assest tag is a formal idea that maps back to either a requisition or a purchase order.

     

    Dell, in many cases, sets the asset tag to the DELL id TAG.

    This has little to do with the DELL number which needs to be cahnged by the Dell utility as it is stored in the vendors portion of the motherboard NVRAM>

    Older systems mostly do not have these values (UUID,SB) so WMI dummies them upi with a fake value.  Since the memory location doe snot exist you cannot set a value.

    UUID is 'Universally Unique ID.  Microsft uses GUID which is Globally Unique.  Pretty much the same thing but when ISO(or ANSI) took it over they dumped the MS name.

    It is pretty much like a serial number that cannot be tracked back to anything.  It cannot be duplicated so it is great for an inventory unique ID.  No two vendors can ever generate the same UUID.  It is the wave of teh future.  Soon you Corn FLakes will have a UUID.

     

     


    jv
    Wednesday, June 29, 2011 7:19 PM
  • Problem is that MSI Hetis 945 does not support any of it and quality of support service is terrible. They can't even understand what do I need.

    These days I am trying to find out how to modify Award bios (insert SN, asset tag or UUID). No luck so far...

    Anyway guys thanks for your support.

    Thursday, June 30, 2011 1:32 PM
  • You can't.  It is burned in or not avaialbe in your case.
    jv
    Thursday, June 30, 2011 2:22 PM
  • okay then is it possible to distinguish integrated NIC MAC address from other present MAC addresses?

     

    Thursday, June 30, 2011 2:56 PM
  • okay then is it possible to distinguish integrated NIC MAC address from other present MAC addresses?

     


    Not sure what you mean. MAC address is built into the adapter but can usually be overwritten.  This has nothing to do with WMI, UUID or scripting.

     


    jv
    Thursday, June 30, 2011 5:47 PM
  • wmic path Win32_ComputerSystemProduct get UUID

    ?

    Wednesday, November 7, 2012 7:52 PM