Physical & ownership inspection

A laptop that's reported stolen, or still tied to someone else's account, can be remotely locked or seized — leaving you with a paperweight. Verify the basics first.

• Ask for the box, receipt or invoice. The serial number on the receipt should match the sticker on the laptop's underside.
• Find the serial / service tag on the bottom panel. On Dell it's the "Service Tag", on HP/Lenovo the "Serial Number".
• Check warranty & original specs by typing the serial into the maker's support site — it confirms the model, age, and that the serial is real: Dell · HP · Lenovo · Asus · Acer
• Meet in a safe, public place and prefer a seller who'll let you test fully. Refusal to let you run checks is itself a red flag.

A supervisor/BIOS password (common on ex-corporate machines) can block booting, changing settings, or reinstalling Windows — and it's often impossible to remove. Test it:

• Power on and immediately tap the BIOS key repeatedly: usually F2, Del, F10, or Esc (varies by brand).
• You should reach the BIOS/UEFI setup screen without being asked for a password.
• Check it's not an ex-corporate locked unit: no "Computrace"/"Absolute" set to Activated, no asset/ownership tag lock, and Secure Boot can be toggled. A Computrace-activated machine can be remotely bricked even after a fresh Windows install. (You'll also confirm company-management in Stage 7.)

Liquid damage often works for weeks, then kills the board. Corrosion is hard to fix and a deal-breaker at most prices.

• Smell the keyboard and vents — a sweet/sour or "electrical" smell hints at spilled liquid or burnt components.
• Tilt the screen in good light and look for sticky residue, discoloration, or corrosion around the keys and ports.
• Inspect ports closely (USB, charging) for green/white corrosion or bent pins.
• Check corners and the lid for cracks or dents that suggest a drop.

Repairs aren't automatically a problem, but mismatched parts or sloppy work can mean trouble (and weaker resale).

• Stripped or mismatched screws on the bottom panel = it's been opened.
• Gaps or uneven seams in the chassis suggest a panel wasn't reseated properly.
• A non-original screen may have different bezels, slightly off colors, or a different coating (glossy vs matte).
• Ask directly: "Has anything been replaced or repaired?" — and watch the reaction.

• Open and close the lid slowly. It should move smoothly and stay put at any angle — no wobble, grinding, or the screen flopping back.
• Gently flex the chassis. Excessive creaking or a "soft" deck can mean a cracked internal frame.
• Press around the keyboard and palm rest — it shouldn't bend or click.
• Check rubber feet and the bottom panel are present and seated.

Now switch it on. You're checking it boots cleanly to a working Windows desktop you can control.

• It should power on, show the maker's logo, and reach the Windows desktop or a fresh setup screen.
• Ideally Windows is already set up to the desktop (not stuck on someone's locked account). If it's stuck on a password or a Microsoft account you can't access, you can't test it — and may not be able to use it.
• Listen for unusual fan noise, clicking, or beeps at boot.
• Note the time to desktop — very slow boots can hint at a failing drive (you'll confirm in Stage 5).
• The charger: use the laptop's own charger and check it's genuine and the right wattage for the model, the brick/cable aren't discoloured or smelling of burnt plastic, and it plugs in firmly without wiggling. A wrong/weak charger can stop it charging or limit performance.