Installation for Apktool
Windows:
1.Download apktool.bat
2.Download apktool 2.3.0.jar
3.Rename downloaded jar to apktool.jar
4.Move both files (apktool.jar & apktool.bat) to your Windows directory (Usually C://Windows)
5.If you do not have access to C://Windows, you may place the two files anywhere then add that directory to your Environment Variables System PATH variable.
6.Try running apktool via command prompt