**I had uninstalled all node modules and reinstall but still problem is not solved ?**

To uninstall 
`npm uninstall -g @angular/cli`

To install again
`npm install -g @angular/cli`

I had uninstalled nodejs from control panel also and reinstalled also.

[![ Here is my problem ! ](https://i.stack.imgur.com/nJ6s4.png)](https://i.stack.imgur.com/nJ6s4.png)