On a Mac:
Click the "Apple" logo in top left corner of your screen
Select "About This Mac."
On a PC:
Go to Start > Settings > System > About.
Look for the “Device specifications” section
Some laptop manufacturers provide their own tools to display system information, including the serial number. Some examples include:
HP
Dell
Lenovo
If you’re having trouble finding the device serial number in the system settings, try referring to the manufacturer’s website for guidance.
Once you find the serial number:
Type the serial number into the "Add item" information form in your account.
When you take a photo of the "About page"
Take a clear photo showing the entire screen and keyboard of your laptop
Make sure the screen is powered on with the about page/system showing
Then take a photo of the back/bottom of your laptop.
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