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Here the free list key Windows 10 PRODUCT KEY FREE 2018
When you’re asked to enter a product key, please enter one of the following keys depending on the edition of Windows 10 you’re installing or activating.
Windows 10 Home: TX9XD-98N7V-6WMQ6-BX7FG-H8Q99
Windows 10 Pro: VK7JG-NPHTM-C97JM-9MPGT-3V66T
Windows 10 Enterprise: NPPR9-FWDCX-D2C8J-H872K-2YT43
These product keys can be used to activate all preview builds of Windows 10 that are officially released by Microsoft, which also means that the key might not work on leaked Windows 10 builds!
Note that the above mentioned Windows 10 product keys work irrespective of the architecture of Windows 10, meaning they support both 32-bit and 64-bit. Just make sure that you’ve typed the 25-character correctly, without any mistakes. Note that all these Windows 10 product keys are offered by Microsoft.
Aslo you can use the tools to active Windows 10 PRODUCT KEY,please see this vide
I thinks the post will help you solve the Windows 10 PRODUCT KEY trouble