Error: npm install -g #angular/cli - angularjs

Question

When I am trying to run this command, it through error and NPM does not install completely.
Before this version of Node.js I also installed node-v8.9.1-x64.msi, but their same issue I was facing that's why I uninstalled and installed node-v6.11.0-x64
But still, I am not able to solve this issue.
Node Version: v6.11.0
NPM Version: 3.10.0
Error Message:
D:\angular\NPM>npm install -g #angular/cli
C:\Users\XXX\AppData\Roaming\npm
`-- (empty)
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents#^1.0.0 (node_modules\#a
ngular\cli\node_modules\chokidar\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents#
1.1.3: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"}
)
npm ERR! Windows_NT 6.1.7601
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\
node_modules\\npm\\bin\\npm-cli.js" "install" "-g" "#angular/cli"
npm ERR! node v6.11.0
npm ERR! npm v3.10.10
npm ERR! path C:\Users\XXX\AppData\Roaming\npm\node_modules\.staging\rxjs-8d
1ee8eb
npm ERR! code EPERM
npm ERR! errno -4048
npm ERR! syscall rename
npm ERR! Error: EPERM: operation not permitted, rename 'C:\Users\XXX\AppData
\Roaming\npm\node_modules\.staging\rxjs-8d1ee8eb' -> 'C:\Users\XXX\AppData\R
oaming\npm\node_modules\#angular\cli\node_modules\rxjs'
npm ERR! at destStatted (C:\Program Files\nodejs\node_modules\npm\lib\instal
l\action\finalize.js:25:7)
npm ERR! at C:\Program Files\nodejs\node_modules\npm\node_modules\graceful-f
s\polyfills.js:264:29
npm ERR! at FSReqWrap.oncomplete (fs.js:123:15)
npm ERR!
npm ERR! Error: EPERM: operation not permitted, rename 'C:\Users\XXX\AppData
\Roaming\npm\node_modules\.staging\rxjs-8d1ee8eb' -> 'C:\Users\XXX\AppData\R
oaming\npm\node_modules\#angular\cli\node_modules\rxjs'
npm ERR! at Error (native)
npm ERR! { Error: EPERM: operation not permitted, rename 'C:\Users\XXX\AppD
ata\Roaming\npm\node_modules\.staging\rxjs-8d1ee8eb' -> 'C:\Users\XXX\AppDat
a\Roaming\npm\node_modules\#angular\cli\node_modules\rxjs'
npm ERR! at destStatted (C:\Program Files\nodejs\node_modules\npm\lib\instal
l\action\finalize.js:25:7)
npm ERR! at C:\Program Files\nodejs\node_modules\npm\node_modules\graceful-f
s\polyfills.js:264:29
npm ERR! at FSReqWrap.oncomplete (fs.js:123:15)
npm ERR!
npm ERR! Error: EPERM: operation not permitted, rename 'C:\Users\XXX\AppData
\Roaming\npm\node_modules\.staging\rxjs-8d1ee8eb' -> 'C:\Users\XXX\AppData\R
oaming\npm\node_modules\#angular\cli\node_modules\rxjs'
npm ERR! at Error (native) parent: '#angular/cli' }
npm ERR!
npm ERR! Please try running this command again as root/Administrator.
npm ERR! Please include the following file with any support request:
npm ERR! D:\angular\NPM\npm-debug.log
npm ERR! code 1

Answer 1

Normally I'd say "use it with sudo" like
sudo npm install -g #angular/cli
But since you are on Windows, try with an elevated command prompt.
In other words: Start your console (CMD) as Administrator and run the command again.
If that doesn't work, type
npm cache clean
And then just run
npm install -g #angular/cli
again.

Answer 2

For Angular 4+ project development, you should use latest node version v8.8.9. So that you won't face any errors related to any modules.

Answer 3

I have same issue while trying to install #angular/cli
I found the node.js version I had installed was 6.10. Then I upgraded my node.js to 8.10.0 and tried:
npm install -g #angular/cli works fine.
The old version of npm doesn't support new features of Angular.