Activate Windows 8.1 Final Version without any Activator/

Step 1: Download the rar file from here and extract it.

Step 2: Disable Internet Connection (CMD>net stop sppsvc OR manually disable it from internet setting)

Step 3:
           Go to:
           C:\Windows\System32\spp
           Rename:
           tokens to tokens-bak
           paste the downloaded "tokens" instead

Step 4:
           Go to:
           C:\Windows\SYSWOW64\spp
           Rename:
           tokens to tokens-bak
           paste the downloaded "tokens" instead

Step 5:
           Go to:
           C:\Windows\System32\spp\store\2.0\cache
           Delete:
           "cache.dat"

Step 6:
           Go to:
           C:\Windows\System32\spp\store\2.0
           rename:
           tokens.dat to tokens.datbak
           paste the downloaded "files.dat" instead

Step 7:
           Open Command Promp with run as administrator, type the following and hit the enter
         
           If your Windows is Windows 8.1 Pro        
than
enter
slmgr -ipk NTTX3-RV7VB-T7X7F-WQYYY-9Y92F
If your Windows version is Windows 8.1 Enterprise       
slmgr -ipk YNB3T-VHW8P-72P6K-BQHCB-DM92V


restrart pc nd enjoy.