ng is not recognized as an internal or external command

Question

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:

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step 2 :

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step3:

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step4:

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step5: add missing ng path

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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.