Microsoft’s Windows 10 technical preview was announced on 30th Sep 2014 and as usual Microsoft has shared some product keys to test its technical preview edition.
Generally you need not to enter the product key for any preview installation, it gets automatically activated. However, if you are prompted to enter a product key, you can use following license keys to activate Microsoft’s Windows 10 technical preview.
Note: The following keys are publically shared by Microsoft and can’t be used for production purposes. These are valid only for testing of Windows 10 technical preview.
Key of Windows 10 Tech preview:
NKJFK-GPHP7-G8C3J-P6JXR-HQRJR
http://windows.microsoft.com/en-us/windows/preview-iso
Key of Windows 10 Tech preview for enterprise:
PBHCJ-Q2NYD-2PX34-T2TD6-233PK
http://www.microsoft.com/en-us/evalcenter/evaluate-windows-technical-preview-for-enterprise
Before installation make sure your computer meets all the hardware requirements.