how to install reactjs on windows 8

I am following steps to install reactjs from his official website https://facebook.github.io/react/

just look at error I am geting.

C:\Windows\System32>npm install create-react-app -g npm ERR! Windows_NT 6.3.9600 npm ERR! argv "C:\Program Files\nodejs\node.exe" "C:\Program Files\nodejs\ node_modules\npm\bin\npm-cli.js" "install" "create-react-app" "-g" npm ERR! node v7.9.0 npm ERR! npm v4.2.0

npm ERR! Cannot read property 'path' of null npm ERR! npm ERR! If you need help, you may report this error at: npm ERR! https://github.com/npm/npm/issues

npm ERR! Please include the following file with any support request: npm ERR! C:\Users\NULLPLEX5-PC\AppData\Roaming\npm-cache_logs\2017-05-26T12 _03_16_585Z-debug.log

C:\Windows\System32>

via Abdul Ansari