I'm using Windows 10. I want to use Angular 4 on my system. When I run node -v and npm -v it displays the version. But when I execute the statement npm install -g @angular/cli, i gives :

```
npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142C:\Users\VAISHU\AppData\Roaming\npm\ng -> C:\Users\VAISHU\AppData\Roaming\npm\node_modules\@angular\cli\bin\ng

> @angular/cli@9.1.9 postinstall C:\Users\VAISHU\AppData\Roaming\npm\node_modules\@angular\cli
> node ./bin/postinstall/script.js

+ @angular/cli@9.1.9
updated 1 package in 15.317s

```

when I enter the command ng -v, it shows :

```
Available Commands:
  add Adds support for an external library to your project.
  analytics Configures the gathering of Angular CLI usage metrics. See https://angular.io/cli/usage-analytics-gathering.
  build (b) Compiles an Angular app into an output directory named dist/ at the given output path. Must be executed from within a workspace directory.
  deploy Invokes the deploy builder for a specified project or for the default project in the workspace.
  config Retrieves or sets Angular configuration values in the angular.json file for the workspace.
  doc (d) Opens the official Angular documentation (angular.io) in a browser, and searches for a given keyword.
  e2e (e) Builds and serves an Angular app, then runs end-to-end tests using Protractor.
  generate (g) Generates and/or modifies files based on a schematic.
  help Lists available commands and their short descriptions.
  lint (l) Runs linting tools on Angular app code in a given project folder.
  new (n) Creates a new workspace and an initial Angular app.
  run Runs an Architect target with an optional custom builder configuration defined in your project.
  serve (s) Builds and serves your app, rebuilding on file changes.
  test (t) Runs unit tests in a project.
  update Updates your application and its dependencies. See https://update.angular.io/
  version (v) Outputs Angular CLI version.
  xi18n (i18n-extract) Extracts i18n messages from source code.

For more detailed help run "ng [command name] --help"

```

I don't know whether I have to uninstall Node js, and install again. Please suggest any solution. Thank You.