解决npm 的 shasum check failed for错误

npm安装失败，报错如下时候：

 

 C:Program Files
odejs>npm update npm
npm ERR! Windows_NT 10.0.14393
npm ERR! argv "C:\Program Files\nodejs\node.exe" "C:\Program Files\nodejs\node_modules\npm\bin\npm-cli.js" "update" "npm"
npm ERR! node v6.2.0
npm ERR! npm  v2.14.19

npm ERR! shasum check failed for C:UserskuaimaAppDataLocalTempnpm-18136-7181dc7d
egistry.npmjs.orgnpm-npm-4.0.5.tgz
npm ERR! Expected: a9c3c00c3c5bd6b0538c71109e019afd9d5b1403
npm ERR! Actual:   229ee9303b213d8ad584a6d4f65b971874d5b0e9
npm ERR! From:     https://registry.npmjs.org/npm/-/npm-4.0.5.tgz
npm ERR!
npm ERR! If you need help, you may report this error at:
npm ERR!     <https://github.com/npm/npm/issues>

npm ERR! Please include the following file with any support request:
npm ERR!     C:Program Files
odejsnpm-debug.log

　使用cnpm安装即可