How to Change Your Windows Product Key
Swap the product key on your Windows PC — upgrading editions or moving to a new license — in Settings or with slmgr.
Last updated · January 2026
Tutorial progress · 0 of 7 steps
Tick steps as you complete them — progress is saved on this device.
You may need to change your Windows product key to upgrade from Home to Pro, replace a license, or activate after a reinstall. The process takes seconds and keeps all your files.
01Change the key in Settings
02Change the key with Command Prompt
03Upgrading editions
To go from Home to Pro, enter your Pro key directly — Windows upgrades in place, keeping apps and data. If the key is rejected, use the generic edition key first, restart, then enter your real key.
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