不知道为什么我的项目是建站攻略1的代码 在此基础上安装grunt-contrib-watch报一下错误

D:\project\imooc>npm install grunt-contrib-watch --save-dev

npm WARN package.json package.json@0.0.0 No repository field.

npm WARN package.json package.json@0.0.0 No README data

npm ERR! Error: EPERM, unlink 'D:\project\imooc\node_modules\grunt-contrib-watch

'

npm ERR!  { [Error: EPERM, unlink 'D:\project\imooc\node_modules\grunt-contrib-w

atch']

npm ERR!   errno: 50,

npm ERR!   code: 'EPERM',

npm ERR!   path: 'D:\\project\\imooc\\node_modules\\grunt-contrib-watch' }

npm ERR!

npm ERR! Please try running this command again as root/Administrator.

npm ERR! System Windows_NT 6.1.7601

npm ERR! command "C:\\Program Files\\nodejs\\\\node.exe" "C:\\Program Files\\nod

ejs\\node_modules\\npm\\bin\\npm-cli.js" "install" "grunt-contrib-watch" "--save

-dev"

npm ERR! cwd D:\project\imooc

npm ERR! node -v v0.10.35

npm ERR! npm -v 1.4.28

npm ERR! path D:\project\imooc\node_modules\grunt-contrib-watch

npm ERR! code EPERM

npm ERR! errno 50

npm ERR! stack Error: EPERM, unlink 'D:\project\imooc\node_modules\grunt-contrib

-watch'

npm ERR! error rolling back Error: EPERM, unlink 'D:\project\imooc\node_modules\

grunt-contrib-watch'

npm ERR! error rolling back  { [Error: EPERM, unlink 'D:\project\imooc\node_modu

les\grunt-contrib-watch']

npm ERR! error rolling back   errno: 50,

npm ERR! error rolling back   code: 'EPERM',

npm ERR! error rolling back   path: 'D:\\project\\imooc\\node_modules\\grunt-con

trib-watch' }

npm ERR! not ok code 0