active microsoft windows
Activating Windows Using a Product Key
Follow these steps to activate Windows with a valid product key:
1 Open Windows Activation Settings
2 Press
Windows + I
to open Settings.3 Go to Update & Security > Activation (left menu).
4 Under Activation, click Change product key.
5 In the pop-up window, enter your 25-character product key (format:
XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
) and click Next.
If you encounter error 0xC004C020
OR
error
0xC004C008