Activate Windows 10 via phone service is still available!
Referring to dism and Windows 10 edition upgrade matrix to determine which edition you are currently using
Few methods to change Windows 10 Product Key
If you’re curios to find what is that key, the Windows 10 native wmic command can retrieve this OEM product key from BIOS too.
If your Raspberry Pi is running Kodi and connect to a TV with HDMI CEC feature enabled, you can use the TV remote control to interact with Kodi (the open source media center).
The findstr command supports regular expression, though it’s not as complete as GNU grep command.
Using Windows netsh command to detect various WLAN network information, e.g. non-hidden SSID, wifi channel and signals, security protocol, radio type, etc.