Prepare the handover before erasing anything
A computer can look empty while still holding browser sessions, saved accounts, application data and recoverable deleted files. Removing the desktop folders is not a complete handover procedure. Before beginning, copy the files you want to keep and open those copies on another device. Include less visible material such as local mail archives, saved projects and application exports. Store any recovery keys you may still need somewhere other than the computer being sold.
Disconnect external backup drives and memory cards so they cannot become accidental targets. Check whether the computer contains more than one internal storage device. A reset that affects only the operating-system drive may leave personal files on a second disk. Record which devices are staying with the machine and which you will keep.
Match the method to the data
For an ordinary personal Windows PC, Microsoft's reset process includes a Remove everything option and a data-cleaning setting intended for a device being passed to someone else. Read the final confirmation carefully, including which drives it covers. Microsoft describes this cleaning as consumer-oriented, not as meeting government or industry data-erasure standards. Do not turn that feature into a guarantee that every type of sensitive information is irrecoverable under every circumstance.
If the machine held regulated business information or particularly sensitive records, follow the organisation's disposal procedure or obtain a suitable professional service. Storage manufacturers may offer device-specific sanitisation methods, but compatibility and the exact command matter. Avoid copying an erase command from a discussion thread without confirming its purpose and target. A failed or unresponsive drive also needs a different plan from a healthy one that can complete a supported operation.
Leave a usable machine without your accounts
Keep the computer connected to reliable power while the chosen reset or sanitisation procedure runs. Do not interrupt it because the progress display pauses briefly. If it reports an error, investigate that result rather than assuming the earlier steps removed everything. Once the supported reset finishes, confirm that the machine reaches its initial setup screen without signing back into your personal account.
Remove the old computer from relevant account device lists where appropriate and review any software licences that need deactivation or transfer. These account actions complement local data removal; they do not replace it. Keep a brief private note of the date and method used. The buyer needs a working computer and an honest description of its condition, not your previous login details or the backup drive that contains your new copy.
Decide what is actually included in the sale
An old computer is sometimes sold without its storage drive. That can be a sensible choice when the drive contains data you must retain or cannot confidently erase, provided the listing clearly says that storage and an installed operating system are not included. Check the service manual before attempting removal: on some devices storage is not a straightforward removable component. Do not promise a simple upgrade path without checking the model.
If you remove a drive, label and store it as data-bearing equipment rather than putting it into a box of spare cables. A retained disk is still a privacy responsibility and can still fail. Copy any needed information elsewhere; keeping an old drive on a shelf is not a substitute for a current backup.
Also inspect removable media slots and USB receivers before packing. A forgotten SD card can contain personal photographs even after the internal storage has been cleaned. A receiver may belong to a keyboard or mouse you are keeping. These physical checks take little time and prevent a technically correct reset from being undermined by an overlooked accessory.
