npm init でpackage.jsonを作成できない

プログラミング初心者です

Webアプリケーションを作成するために、Laravel5でBootstrap4を使おうと思い方法を調べていたら、Bootstrap4からはpopper.jsが必要だということが分かりました。Laravel5でpopper.jsを使うにはpakcage.jsonを使う必要があるそうなので、PCにnpmをインストールしpackage.jsonを作成しようとしたのですが、ここで問題発生です。
package.jsonを作成するために　npm init　で質問に答えて必要な項目を打ち込んだのですがエラーが沢山出てきてpackage.jsonを作成できません。
この問題を解決できる方がおりましたらおどうか願いします。

発生している問題・エラーメッセージ

エラーメッセージ

npm ERR! path c:\package.json
npm ERR! code EPERM
npm ERR! errno -4048
npm ERR! syscall open
npm ERR! Error: EPERM: operation not permitted, open 'c:\package.json'
npm ERR!  { [Error: EPERM: operation not permitted, open 'c:\package.json']
npm ERR!   stack:
npm ERR!    'Error: EPERM: operation not permitted, open \'c:\package.json\'',
npm ERR!   errno: -4048,
npm ERR!   code: 'EPERM',
npm ERR!   syscall: 'open',
npm ERR!   path: 'c:\package.json' }
npm ERR!
npm ERR! The operation was rejected by your operating system.
npm ERR! It's possible that the file was already in use (by a text editor or antivirus),
npm ERR! or that you lack permissions to access it.
npm ERR!
npm ERR! If you believe this might be a permissions issue, please double-check the
npm ERR! permissions of the file and its containing directories, or try running
npm ERR! the command again as root/Administrator (though this is not recommended).

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\syiugisty\AppData\Roaming\npm-cache\_logs\2018-09-23T19_52_29_755Z-debug.log

該当のソースコード(npm init 以降の文)

c:\>npm init
This utility will walk you through creating a package.json file.
It only covers the most common items, and tries to guess sensible defaults.

See `npm help json` for definitive documentation on these fields
and exactly what they do.

Use `npm install <pkg>` afterwards to install a package and
save it as a dependency in the package.json file.

Press ^C at any time to quit.
package name: hoge
version: (1.0.0)
description:
entry point: (index.js)
test command:
git repository:
keywords:
author:
license: (ISC)
About to write to c:\package.json:

{
  "name": "hoge",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC"
}


Is this OK? (yes)

試したこと

・コマンドプロンプトの再起動
・PCの再起動
・npm再インストール
・npm cach clean でキャッシュクリアを試みるもエラー

c:\>npm cache clean
npm ERR! As of npm@5, the npm cache self-heals from corruption issues and data extracted from the cache is guaranteed to be valid. If you want to make sure everything is consistent, use 'npm cache verify' instead. On the other hand, if you're debugging an issue with the installer, you can use `npm install --cache /tmp/empty-cache` to use a temporary cache instead of nuking the actual one.
npm ERR!
npm ERR! If you're sure you want to delete the entire cache, rerun this command with --force.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\syiugisty\AppData\Roaming\npm-cache\_logs\2018-09-23T20_46_20_308Z-debug.log