How to Find Your Device Serial Number in Windows (2026 Guide)

You can find your device serial number in Windows by using Command Prompt, PowerShell, or the System Information tool. The fastest method is running a simple BIOS command, which works on both Windows 10 and Windows 11.

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Quick Answer: How Do I Find My Device Serial Number in Windows?

To find your device serial number in Windows:

1. Press Windows + R

2. Type cmd and press Enter

3. Run:

   wmic bios get serialnumber
   

4. Your serial number will appear instantly

✅ This is the most reliable method and works on most laptops and desktops.

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What Is a Device Serial Number?

A device serial number is a unique hardware identifier assigned by the manufacturer. It is used for warranty claims, device registration, technical support, and hardware inventory tracking.

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Best Ways to Find Device Serial Number in Windows

Method 1: Using Command Prompt (Recommended)

1. Open Command Prompt

2. Type:

   wmic bios get serialnumber
   

3. Press Enter

This command retrieves the serial number directly from the system BIOS.

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Method 2: Using PowerShell

1. Open Windows PowerShell

2. Run:

   Get-CimInstance win32_bios | Select-Object SerialNumber
   

3. View the serial number output

PowerShell is commonly used by IT professionals and system administrators.

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Method 3: Using System Information

1. Press Windows + R

2. Type msinfo32

3. Press Enter

4. Find System Serial Number

This method is useful for users who prefer a graphical interface.

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Why Is My Serial Number Missing?

Your serial number may not appear if:

• The PC is custom-built

• The system is a virtual machine

• The BIOS does not contain manufacturer data

In such cases, the serial number may display as “To Be Filled By O.E.M.”

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Frequently Asked Questions

How do I find my laptop serial number in Windows 11?

Open Command Prompt and run:

wmic bios get serialnumber

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Is the device serial number the same as the Windows product key?

No. The serial number identifies the hardware, while the Windows product key is used for software activation.

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Can I find the serial number without turning on my PC?

Yes. Check the label on the bottom of the laptop, the back of a desktop, or the original packaging.

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Final Takeaway

The fastest way to find your Windows device serial number is by using Command Prompt or PowerShell. These built-in tools provide accurate results without installing third-party software.