click run i wait then it says cant find java directory

[TeMorrisonJuggernaut]

Launcher Version: latest

Operating System: windows 7

Java Version: latest

Antivirus Program: Total defense secuirity

Description of Problem:

i tried fist and it said downloading launcher then it said couldnt find java directory ive tried re-installing but now it doesnt say downloading launcher just says cant find java directory do i need winrar for it or what i need help

Error Messages:

cant find java directory

Error Log:

[Torezu]

Add Java to your system path variable. Google it.