Every Windows 11 PC has a unique serial number assigned by the manufacturer. This identifier is essential when you need technical support, check warranty status, or register your device. Unlike your PC’s model number, the serial number is unique to your individual machine — just like a fingerprint.
In this guide, we’ll cover multiple methods to find your PC serial number in Windows 11 — using built-in tools like Command Prompt, PowerShell, and Settings, as well as physical inspection.
Why Do You Need Your PC Serial Number?
You might need to find your serial number in situations like:
Warranty claims (Dell, HP, Lenovo, ASUS, etc. require it).
Technical support (manufacturers ask for it when troubleshooting).
Device registration (for updates and replacement parts).
Inventory management (IT admins use it to track company devices).
Reporting theft or loss (helps authorities identify your PC).
Method 1: Find Serial Number Using Command Prompt
This is the quickest and most reliable method.
Steps:
Press Win + S, type cmd, then right-click Command Prompt and select Run as administrator.
In the window, type the following command:
Press Enter.
The serial number will appear on the screen.
👉 If it shows as “To be filled by O.E.M.”, your manufacturer didn’t embed it in the BIOS. Use other methods below.
Method 2: Find Serial Number Using PowerShell
PowerShell gives the same result as Command Prompt but with a slightly different command.
Steps:
Press Win + X and choose Windows Terminal (Admin).
Enter this command:
Press Enter.
Your PC’s serial number will be displayed.
Method 3: Find Serial Number in Windows Settings
Some devices display the serial number in Windows Settings.
Steps:
Press Win + I to open Settings.
Go to System > About.
Scroll down and look under Device specifications.
⚠️ Note: Not all manufacturers show the serial number here — if you don’t see it, try Command Prompt or PowerShell.
Method 4: Check the Label on Your Device
If Windows doesn’t show the serial number, you can usually find it physically:
Laptops: Printed on a label underneath the laptop or inside the battery compartment.
Desktops/PC towers: On a sticker at the back or side panel.
2-in-1 devices: Check the back of the device or under the kickstand.
Look for labels that say “S/N” or “Serial Number.”
Method 5: Find Serial Number in BIOS/UEFI Firmware
Even if it’s not visible in Windows, BIOS often shows the serial number.
Steps:
Restart your PC.
Press the correct key (F2, F10, F12, Esc, or Del) during startup to open BIOS/UEFI.
Look for System Information or Main tab.
Locate the Serial Number entry.
Method 6: Use Manufacturer Software
Major PC makers have dedicated tools that display system details, including the serial number:
HP Support Assistant (for HP laptops & desktops).
Dell SupportAssist (for Dell devices).
Lenovo Vantage (for Lenovo ThinkPads & IdeaPads).
ASUS MyASUS (for ASUS laptops).
Simply install and open the app to view your device information.
Troubleshooting — Why Can’t I See My Serial Number?
Blank or “To be filled by O.E.M.” → The manufacturer didn’t set it in BIOS.
Scratched-off labels → Use BIOS or official support apps.
Custom-built PCs → The motherboard may not have a serial number; instead, use the model number of the motherboard.
Conclusion
Finding your PC serial number in Windows 11 is easy and can be done in several ways:
Command Prompt / PowerShell for quick access.
Settings or BIOS for built-in system info.
Device labels or manufacturer tools if Windows doesn’t display it.
✅ Pro Tip: Write down or save your serial number in a safe place. You’ll thank yourself later if you ever need support, warranty repair, or to report your device as lost.
FAQs
1. Can I find my serial number without turning on my PC?
Yes — check the sticker or label on the back/bottom of your device.
2. Is the serial number the same as the product key?
No. The Windows product key is for your OS license, while the serial number identifies your hardware.
3. What if my serial number shows “To be filled by O.E.M.”?
That means the manufacturer didn’t embed it in the BIOS. Try checking the physical label or BIOS menu.
4. Can I change my PC’s serial number?
Not officially. It’s embedded by the manufacturer and shouldn’t be modified.
5. Is my serial number sensitive information?
Yes, treat it like private data — don’t share it publicly, since it can be used for warranty fraud.