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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
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.