nvm下载node时无法下载npm

使用nvm下载node后报错 提示程序被占用 然后node_modules文件夹为空 C:\Users\Administrator>nvm uninstall 8.12.0 Uninstalling node v8.12.0... done C:\Users\Administrator>nvm install 8.12.0 Downloading node.js version 8.12.0 (64-bit)... Complete Downloading npm version 6.4.1... Download failed. Rolling Back. Rollback failed. remove C:\dev\nvm\temp\npm-v6.4.1.zip: The process cannot access the file because it is being used by another process. Could not download npm for node v8.12.0. Please visit https://github.com/npm/cli/releases/tag/v6.4.1 to download npm. It should be extracted to C:\dev\nvm\v8.12.0

文件夹里没有npm命令 镜像地址也改过了 root: C:\dev\nvm path: C:\dev arch: 64 proxy: none node_mirror: http://npm.taobao.org/mirrors/node/ npm_mirror: http://npm.taobao.org/mirrors/npm/ 也重装过nvm但还是不行，弄半天没弄好，求大神给个解决办法