How do you see if the Win8 system is successfully activated?

After many friends installed Windows 8 system and activated, the system showed that the activation was successful, but when it was actually used, it was found that Windows 8 was not actually activated!
Here is a simple way to test Windows 8 Whether the system was successfully activated:
1. Press and hold “Win+F" on the keyboard to enter the search dialog.
2. Enter “cmd" in the dialog box and press Enter on the keyboard.

In the new pop-up dialog box, type “slmgr/xpr”.

3. Check the new pop-up dialog box. If Windows 8 is successfully activated, you can see the software version information and when it will expire.