How to Trade Windows Key Products: 1. Select the product key available in the Windows category and make a purchase on My Items 2. Make payment for your order 3. Wait until the seller sends your order in the form of a combination of letters and numbers with the chat feature 4. Upgrade or reinstall your device before activating, make sure the device is connected to the internet to activate 5. Check the activation status of your device (how to check can be seen below) and delete the license installed on our device (if any) 6. Open Start then Settings 7. Select Upgrade & Security, then select Activation 8. Select Change Product Key and enter the Product Key that you ordered 9. Select Next and make sure your Windows is activated 10. If it is correct, select the Done button on My Items to complete your order How to check the condition of the license installed on the device: 1. Open Command Prompt (Run as Administration) 2. Check the type of license installed on the device by typing: "slmgr dlv" = displays activation and installation IDs and other details "slmgr dli" = displays Windows Edition and Product Key "slmgr xpr" = displays activation expiration 3. If there is a license still installed, delete it by typing: "slmgr upk" = uninstall the existing Product Key "slmgr = delete Registry Product Key