ng is not recognized as an internal or external command

Running windows 7 Professional 32bit.

I tried running npm install -g angular-cli both under normal or admin.

I also tried adding it to the Enviorment Variables under PATH: (C:\Users\Administrator\AppData\Roaming\npm\node_modules\angular-cli\bin\ng) , with no success also.

What am i doing wrong?

I solved this problem in accordance with the figure:

run in cmd

 npm install -g @angular/cli

and then

( open in Windows 10) Control Panel\All Control Panel Items\System
or accordance with the figure

step 1:

step 2 :

step3:

step4:

step5: add missing ng path

Here is new environment variable that you need add: C:\Users\PK\AppData\Roaming\npm\node_modules\@angular\cli\bin

Finally, restart all opened command prompts and try again.