Start with the right checks.
Deleting a few folders or signing out of a browser is not the same as preparing a computer for a new owner. Treat the handover as two jobs: preserve the information you need and remove access you no longer want to leave behind.
What to do next.
Make an independent copy of needed documents and check that several files open on another device. Keep account and software ownership records separately.
Disconnect external storage containing your backup before you begin an erase. Check the device and drive you intend to hand over.
Review Microsoft’s Reset this PC guidance. Remove everything is different from Keep my files. For consumer handovers, review the Clean data option and the final removal summary.
Proceed only when the selected scope is correct. Keep power connected and allow the operation to finish before handing over the PC.
Check the result.
The machine should reach its initial setup experience without exposing your files. Do not sign back into personal accounts simply to demonstrate the computer to its next owner.
Stop and get help if…
There are multiple drives, failed storage, business retention requirements or uncertainty about ownership. Consumer reset tools do not establish compliance with industry or government erasure standards. A technician can help scope the correct disposal work.