Key Takeaways
Summary
22 items · 30–60 minutes
Why This Checklist Matters
Buying a used or refurbished computer can stretch your budget considerably — but only if you know what to look for. Unlike a new machine with a manufacturer warranty and a clean slate, a secondhand PC comes with an unknown history. Components wear out, software can be compromised, and sellers don't always disclose problems they haven't noticed themselves.
This checklist walks you through the key checks to perform before handing over any money — whether you're browsing an online marketplace, visiting a local shop, or considering a certified refurbished program. If you're still weighing whether used is right for you at all, the same logic that applies to comparing new vs. used in other purchases is worth keeping in mind: upfront price is rarely the whole story.
For a broader understanding of what specs to prioritize in the first place, see our complete walkthrough for first-time computer buyers.
USB Flash Drive
Lets you test USB ports on the spot and can carry a portable diagnostic tool to run during an in-person inspection.
CrystalDiskInfo (Windows)
A free utility that reads the health status and usage hours of a storage drive, helping you spot a failing disk before you buy.
Windows Battery Report
A built-in Windows command-line report that shows battery capacity versus its original design capacity, revealing wear level.
Smartphone or Tablet
Use it to look up the model's specifications online during inspection, so you can verify what the seller claims against published data.
Notepad and Pen
Record model numbers, serial numbers, and any defects you observe during inspection for reference after you leave.
The Full Pre-Purchase Checklist
Work through these groups systematically. If you're buying in person, bring a USB drive and run through as many tests as you can on the spot. If buying online, confirm the seller's return policy before purchasing — ideally in writing.
Source and Seller Verification
Physical Condition
Core Specs and Performance
Battery and Power
Software and Security
Final Sanity Checks
Account Lock Can Make a Device Unusable
If a laptop or desktop is still linked to the previous owner's Apple ID, Microsoft account, or Google account, you may not be able to use the device at all after purchase. This is a security feature, not a glitch — and it cannot be bypassed legitimately. Always verify the previous owner has signed out and removed their account before completing any transaction.
After the Purchase: Your Next Steps
Once you've confirmed the machine meets your standards and completed the purchase, the work isn't quite done. A used computer should be treated like a fresh start: wipe the drive and perform a clean operating system installation whenever possible. This removes any unknown software, malware, or leftover personal data from the previous owner.
From there, our guide on setting up a computer for a non-tech person covers accounts, updates, and backups in plain language. And if this purchase is replacing an old machine, don't overlook what to do with your old computer's files and accounts — migrating data responsibly takes a bit of planning but saves a lot of frustration.
A used computer bought carefully can serve you reliably for years. The time you invest in this checklist now is far less painful than discovering a hardware problem after the return window has closed.