Activate Windows 8 without using crack or patch

1:- Open your command prompt as administrator  

How To Open Command Prompt 

1 press window + r key 

type type cmd in run window 
and press enter     Hacking Tips

2:-  Type exactly what you see below (Press enter after each line)

slmgr /upk

slmgr /ipk NG4HW-VH26C-733KW-K6F98-J8CK4

slmgr /skms lunar21.no-ip.org:80

slmgr.vbs -ato

3:- Restart your system and enjoy your activated windows 8.

Note: This trick was tested on Windows 8 Professional Retail. Enjoy!!!