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Your BIOS serial is saved via software, not hardware. Like anything else that's software based, the BIOS serial can be changed. The serial number data, as well as date and time are kept running even when the computer is powered off through a tiny battery called the CMOS battery. By turning off the CMOS battery, you can force the motherboard to lose it's BIOS serial number data and automatically generate a random new number when its rebooted.
Turn off your computer and disconnect any power cables coming to the computer. Touch your hands on a metallic surface that's grounded to discharge any static electricity on your hands.
Unscrew the screws on the exterior of the computer and open the computer case. Look for the motherboard, which holds the CPU. Locate the CMOS battery, which looks like a coin roughly half an inch wide.
Pull up the clip that holds the battery in place. Lift out the battery. If there is no battery clip, use two fingers to pry the battery out. In either case, it should be relatively easy to get the battery out. Do not use excessive force.
Wait 30 seconds to make sure the power to the CMOS is completely drained.
Place the battery back into its socket.
Turn on the computer. Press 'F1,' 'F2,' 'F12' or 'Del' to enter setup mode. Your BIOS serial number should be changed. Note that you'll also lose data on additional drives to connect on startup, any custom BIOS settings, BIOS passwords as well as time and date. Change all the necessary settings, save your changes and reboot.
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Does Azure Windows VM change OS serial number when VM be allocated and deallocated on demand? If so why any answer or refrnce?
3 Answers
Update:
What “wmic bios get serialnumber” actually retrieves? The
wmic bios get serialnumber
command call theWin32_BIOS
wmi class and get the value of theSerialNumber
property, which retrieves the serial number of the BIOS Chip of your system.wmic os get serialnumber
actually get the same result as Proudct ID which you could also see from Windows Control Panel.
I just installed a new Windows Server 2012 R2 in Azure and got its serial number after first allocated.
And shutdown it to make it deallocated, then restart it and I got this:
As you could see, they are the same.
Azure uses the concept of an Azure VM Unique ID
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This is created witin the bios of the virtual machine at creation time, and is stored with the VM for the lifetime of the VM. This is what is used for the Serial Number.
The only time this changes is when the VM is deleted, and the recreated. i.e. if you clone the disk, the new machine would get a new Serial Number. Other than that you allocate and deallocate at will without any changes to the Serial Number.
Thanks for the reply, but i tried the same in different ways and got different outputs:
1) I tried pulling the BIOS ID and tried restarting it from Portal and also from the VM - THE BIOS ID DIDNT Change.
2) Where as I deallocated the VM for couple of hours and tried using the same script and i got another BIOS Id which is not the previous one.
QUESTION: wmic bios get serialnumberDoes this script give me OS Serial Number or BIOS Serial Number, I tried running in my local laptop and got the laptop serial number not the OS Serial Number.
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This tutorial will show you how to find the manufacturer serial number of hard drives (HHD and SSD) in Windows 7, Windows 8, or Windows 10.
CONTENTS:
- Option One: To Find Serial Number of Hard Drive on Manufacturing Label
- Option Two: To Find Serial Number of Hard Drives in Command Prompt
- Option Three: To Find Serial Number of Hard Drives in PowerShell
1. Look for the serial number on the label on top of the physical hard drive. (see screenshot below)
Change Windows 10 Serial Number
1. Open a command prompt.
2. Enter the command below into the command prompt, and press Enter. (see screenshot below)
Serial Number Windows Xp Sp3
3. You will now see the model, name, and serial number listed for your hard drives.
1. Open PowerShell.
2. Enter the command below into PowerShell, and press Enter. (see screenshot below)
Get-WMIObject win32_physicalmedia | Format-List Tag,SerialNumber
3. You will now see the tag (name) and serial number listed for your hard drives.
That's it,
Shawn