title: How can I solve Angular installing problem?
body: <p>I keep meeting following errors when I tried to install Angular:</p>
  <pre><code>C:\Users\geng&gt;npm install -g @angular/cli
  npm WARN deprecated ini@1.3.5: Please update to ini &gt;=1.3.6 to avoid a prototype pollution issue
  npm WARN deprecated debug@4.2.0: Debug versions &gt;=3.2.0 &lt;3.2.7 || &gt;=4 &lt;4.3.1 have a low-severity ReDos regression when used in a Node.js environment. It is recommended you upgrade to 3.2.7 or 4.3.1. (https://github.com/visionmedia/debug/issues/797)
  npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
  npm WARN deprecated har-validator@5.1.5: this library is no longer supported
  npm ERR! code EEXIST
  npm ERR! path C:\Users\geng\AppData\Roaming\npm\node_modules\@angular\cli\bin\ng
  npm ERR! dest C:\Users\geng\AppData\Roaming\npm\ng.cmd
  npm ERR! EEXIST: file already exists, cmd shim 'C:\Users\geng\AppData\Roaming\npm\node_modules\@angular\cli\bin\ng' -&gt; 'C:\Users\geng\AppData\Roaming\npm\ng.cmd'
  npm ERR! File exists: C:\Users\geng\AppData\Roaming\npm\ng.cmd
  npm ERR! Remove the existing file and try again, or run npm
  npm ERR! with --force to overwrite files recklessly.
  
  npm ERR! A complete log of this run can be found in:
  npm ERR!     C:\Users\geng\AppData\Roaming\npm-cache\_logs\2020-12-09T14_19_26_542Z-debug.log
  </code></pre>
  <p>How can I solve the problem?</p>