For the Windows 10 update to work and you can use the new operating system legally, a valid system license is required. You can easily install the operating system.
Windows 10 Update: Activate full version
A full version of Windows 10 is installed like any other Windows and activated with the enclosed key.
If you have purchased Windows 10 as part of new hardware, you generally do not need to enter keys when installing Windows 10. Windows 10 pulls the key out of the BIOS or the UEFI firmware.
Enable Windows 10 Update
Most users will first come across the free update from Windows 7 or 8.1 to Windows 10.
Here, the activation is slightly different. For the activation of Windows 10 you need a valid Windows Key of the named predecessor versions.
From a running Windows 7 or 8.1 with all updates you must trigger the update on Windows 10. Anyone who has not noted the key for Windows 7 or 8.1 can read it out with the special programs such as Windows Product Key Viewer and save it.
You do not need to type in the key anymore, but maybe you want to install Windodws 7 or 8.1 again later. So pick up the key.
Check Windows 10 Activation
In most cases, the Windows 10 update goes through cleanly. Technically, there is not much to complain about. But many users are amazed when you look and notice that Windows 10 is not activated.
To check if your Windows 10 is activated, call the command line as administrator.
To do this, navigate to the folder “C: Windows System32”, locate the file cmd.exe, right-click and select “Run as administrator”.
Type the command “slmgr / xpr” and press Enter. A small window will open informing you of the activation status and which version of Windows you own.