问题描述
NPM卸载高版本后安装低版本运行报错：

C:\Users\Administrator>npm -v
ERROR: npm v10.2.1 is known not to run on Node.js v10.24.1.  This version of npm supports the following node versions: `^18.17.0 || >=20.5.0`. You can find the latest version at https://nodejs.org/.

ERROR:
C:\Users\Administrator\AppData\Roaming\npm\node_modules\npm\lib\utils\exit-handler.js:19
  const hasLoadedNpm = npm?.config.loaded
                           ^

SyntaxError: Unexpected token .
    at Module._compile (internal/modules/cjs/loader.js:723:23)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)
    at Module.require (internal/modules/cjs/loader.js:692:17)
    at require (internal/modules/cjs/helpers.js:25:18)
    at module.exports (C:\Users\Administrator\AppData\Roaming\npm\node_modules\npm\lib\cli-entry.js:15:23)
    at module.exports (C:\Users\Administrator\AppData\Roaming\npm\node_modules\npm\lib\es6\validate-engines.js:39:10)
    at module.exports (C:\Users\Administrator\AppData\Roaming\npm\node_modules\npm\lib\cli.js:4:31)
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解决方案
删除目录C:\Users\Administrator\AppData\Roaming下的npm和npm-cache目录后重新安装。
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原文链接：https://blog.csdn.net/libra_boy/article/details/133960115