Buying a second-hand laptop, claiming a warranty or asking for tech support all start with the same question: what exactly is in this machine? Here is how to find out fast.
The quick look
Open Settings, then System, then About. You will see the processor, installed RAM and device name. To see how much memory is actually busy, press Ctrl + Shift + Esc and open the Performance tab.
Finding the serial number
Most laptops print it on a sticker underneath. If the sticker has worn off, open PowerShell and type: Get-CimInstance Win32_BIOS | Select-Object SerialNumber. The serial number appears on the next line. You can also find it in the BIOS or UEFI screen, and often in the box or the original receipt.
The check most buyers skip: battery health
Open Command Prompt and run powercfg /batteryreport. Windows saves a report you can open in your browser. Compare the design capacity with the full-charge capacity. A big gap means the battery is tired, which is a strong bargaining point when buying used.
Quick checklist before buying a used laptop
- Does the serial number on the sticker match the one reported by the system?
- Is the installed RAM what the seller claimed?
- What does the battery report say?
- Do all ports, the keyboard and the screen work?
Two minutes of checking can save you from a very expensive mistake.
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