in win7 system 1. Click the start menu in the lower left corner, then find the computer option and click the right mouse button to select “Attributes”,
2. Click ““Change Product Key”. ,
3, enter the key to be modified in the product key field, click Next,
4, in the prompt window that pops up, click OK,
5 At this time, it is displayed that the Windows system is being activated (you must connect the computer to the external network),
6. Finally, the activation is successful,
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