Before selling, returning or passing on a computer, all data must be erased. Important: On a Mac, sign out of your Apple Account first. Otherwise the device stays locked after the reset.
Company computer: Check with it-tects first. it-tects resets managed devices or prepares them for the next person.
Windows
Back up your data: move files to OneDrive and check that everything is synced.
Personal devices: remove the device from your personal Microsoft account at account.microsoft.com/devices.
Choose Start › Settings › System › Recovery › Reset PC.
Choose Remove everything, then Local reinstall.
Under Change settings, turn on Clean data (or Clean the drive). This takes longer but prevents data from being recovered.
Click Reset and wait. The computer restarts several times.
macOS
Back up your data: move files to OneDrive or create a Time Machine backup.
Choose Apple menu › System Settings › [name] › Sign Out. This turns off Find My and Activation Lock.
Choose System Settings › General › Transfer or Reset › Erase All Content and Settings.
Confirm with your Mac password and follow the instructions.
Note: If Windows asks for a BitLocker recovery key, or if the Mac lacks “Erase All Content and Settings” (older devices), please contact support.