Nodejs Error Roll back,because of a Error.node.js Setup wizard ended Prematurel

Win7 (I use a notebook) on the official website of Nodejs download the. msi file installation, installation in half, the progress bar tip: Roll back,because of a Error.node.js Setup wizard ended prematurely.

Finally, manually install the next EXE carrier package and configure environment variables.

This article says to compile npm yourself (http://blog.csdn.net/yczz/article/details/6938260)

I've been getting an error while executing node cli.js install NPM-GF.

NPM WARN using--force I sure hope you know what is doing.
NPM WARN engine [email protected]: Wanted: {"node": ">=0.8", "NPM": "1"} (current: {"node": null, "NPM": "2.0.0-a
Lpha.7 "})
NPM err! Error rolling back error:ebusy, unlink ' D:\NodeJS\npm '
NPM err! Error rolling back [email protected] {[Error:ebusy, unlink ' D:\NodeJS\npm '] errno:10, code: ' E
BUSY ', Path: ' D:\\NODEJS\\NPM '}

The problem is uncertain.

Later reference: http://www.ccydesign.com/nodejs-setup/

Node_path caused by the discovery of no settings. Do not compile NPM directly in the http://nodejs.org/dist/npm/have ready-made, really pit dad.