I have independently installed node.js and added following in environment variables. This is required because in new javaclient version 3.2 we can start appium server using appium class itself so there we need to provide node.exe path
C:\Program Files\nodejs;
C:\ProgramFiles\nodejs\node_modules\npm\bin;
C:\Program Files\nodejs\node_modules\npm\lib;
From appium folder I added following path
…\AppiumForWindows-1.3.4.1\Appium\node_modules\npm\node_modules;