I am showing 3 methods to Activate your windows 8 product key, If you have a product key then you can activate easily if you dont have, i will give you a genuine product key for activation. This method is for those who have the product key in hand, but are getting errors when they try to activate it.
Error while activation:
When you install your windows through any installation key, you notice that there is no way to get that installation activated. You can confirm this by opening Settings from Right sidebar > Change PC settings > Activate Windows. You will face this kind of errors:
Activation Error: Code 0x8007232b DNS Name does not exist
OR
Windows cant be activated right now. Try activating Windows later. If this issue persists, contact Microsoft Customer Service and Support online to activate Windows.
So here most of the end users now they have to re-install the windows OS to get it licensed. Dont worry the following methods will help you out.
Active Windows 8 Product Key | Method No. 1
So, when you have the product key in your hand all you have to do is Open CMD (Run as Administrator) & enter the command:
slmgr -upk
Then go to Settings from Right sidebar > Change PC settings > Activate Windows. Activate your window through it. So in short first you uninstalled the old key and then entered the licensed product key.
Method No. 2
This second method allows you to activate your Windows 8 through Control Panel. Just Open CMD (Run as administrator) and execute the following command (Type it and press enter)
slmgr.vbs ipk ENTER-YOUR-PRODUCT-KEY-HERE
Method No. 3
This method is the easiest one. Just press WIN + R button top open Run and hit enter after typing slui 3