Windows 上无法使用npm、yarn包管理器而且都报相同的错误

$ npm
C:\Program Files\nodejs\node_modules\npm\bin\npm-cli.js:1
(function (exports, require, module, filename,dirname) { b#eg
^

SyntaxError: Invalid or unexpected token
at createScript (vm.js:80:10)
at Object.runInThisContext (vm.js:139:10)
at Module._compile (module.js:576:28)
at Object.Module._extensions..js (module.js:623:10)
at Module.load (module.js:531:32)
at tryModuleLoad (module.js:494:12)
at Function.Module._load (module.js:486:3)
at Function.Module.runMain (module.js:653:10)
at startup (bootstrap_node.js:187:16)
at bootstrap_node.js:608:3

$ yarn复制代码

C:\Program Files (x86)\Yarn\bin\yarn.js:1
(function (exports, require, module, filename,dirname) { b#e,
^