After Win10, you can find many problems. For example, when you add the function to Windows technical preview, you enter the product key of Win8.1, and the result is my computer. The system shows my system as Windows 8.1 Professional with Media Center and the display is not activated. What should I do?
Solution
It is not recommended to use the previous product key to add to the Windows 10 Technical Preview as this may prevent you from getting Windows 10 Technical Preview Update.
To ensure that you get an update to the Windows 10 Technical Preview, it is recommended that you re-download the ISO file and reinstall Windows 10 Technical Preview.
The system home has also explained the key mechanism of Microsoft Windows system. Basically, a system key can only be used in this system. Even if it can be updated freely, it is not used on the new system. The key is activated, but the old system is upgraded.
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