Cannot install @angular/[email protected] after install nodejs

Question

I've tried to install @angular/[email protected] (npm install -g @angular/cli)

Then the following error message appeared:

• npm ERR! Response timeout while trying to fetch http://registry.npmjs.org/@angular-devkit%2fschematics (over 30000ms)

  npm ERR! A complete log of this run can be found in: npm ERR!
  C:\NODEJS\npm-cache_logs\2020-06-16T12_37_01_005Z-debug.log

These solutions I've tried but not work:

• uninstall nodejs, delete all nodejs files related it and trying install nodejs versions(8,10,12).
• uninstall angular(npm uninstall -g @angular/cli)
• npm install --save-dev @angular-devkit/build-angular
• npm cache clean --force
• npm install -g @angular/cli --timeout=60000

• npm config set registry http://registry.npmjs.org/

  Tip:the problem appeared when I tried update angular 8 to angular 9.

Answer 1

After many days I installed Angular 9 by this steps:

• Open Windows PowerShell as admin
• npm install npm@latest -g
• npm cache clean --force
• npm install -g @angular/cli

and I've stopped Windows defender & Firewall