Use gulp/elixir on Windows

Ok, using Windows 7 for development, I have installed node + npm and they are working (node -v and npm -v return their versions). However when I run npm install in my Windows command prompt I'm getting following error(s)

d:\wwwroot\project>npm install
npm WARN optional dep failed, continuing fsevents@0.3.8
npm WARN optional dep failed, continuing fsevents@0.3.8

> spawn-sync@1.0.13 postinstall d:\wwwroot\project\node_modules\gulp-sa
ss\node_modules\node-sass\node_modules\cross-spawn\node_modules\spawn-sync
> node postinstall

\
> node-sass@3.3.3 install d:\wwwroot\project\node_modules\gulp-sass\nod
e_modules\node-sass
> node scripts/install.js

Binary downloaded and installed at d:\wwwroot\project\node_modules\gulp
-sass\node_modules\node-sass\vendor\win32-x64-46\binding.node

> node-sass@3.3.3 postinstall d:\wwwroot\project\node_modules\gulp-sass
\node_modules\node-sass
> node scripts/build.js

` d:\wwwroot\project\node_modules\gulp-sass\node_modules\node-sass\vend
or\win32-x64-46\binding.node ` exists.
 testing binary.
Binary is fine; exiting.
npm ERR! Windows_NT 6.1.7601
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\
node_modules\\npm\\bin\\npm-cli.js" "install"
npm ERR! node v4.1.0
npm ERR! npm  v2.14.3
npm ERR! path C:\Users\Avram\AppData\Roaming\npm-cache\readable-stream\1.0.33\pa
ckage\package.json.281f868242e9f7951c5040cc39d1efed
npm ERR! code EPERM
npm ERR! errno -4048
npm ERR! syscall rename

npm ERR! Error: EPERM: operation not permitted, rename 'C:\Users\Avram\AppData\R
oaming\npm-cache\readable-stream\1.0.33\package\package.json.281f868242e9f7951c5
040cc39d1efed' -> 'C:\Users\Avram\AppData\Roaming\npm-cache\readable-stream\1.0.
33\package\package.json'
npm ERR!     at Error (native)
npm ERR!  { [Error: EPERM: operation not permitted, rename 'C:\Users\Avram\AppDa
ta\Roaming\npm-cache\readable-stream\1.0.33\package\package.json.281f868242e9f79
51c5040cc39d1efed' -> 'C:\Users\Avram\AppData\Roaming\npm-cache\readable-stream\
1.0.33\package\package.json']
npm ERR!   errno: -4048,
npm ERR!   code: 'EPERM',
npm ERR!   syscall: 'rename',
npm ERR!   path: 'C:\\Users\\Avram\\AppData\\Roaming\\npm-cache\\readable-stream
\\1.0.33\\package\\package.json.281f868242e9f7951c5040cc39d1efed',
npm ERR!   dest: 'C:\\Users\\Avram\\AppData\\Roaming\\npm-cache\\readable-stream
\\1.0.33\\package\\package.json',
npm ERR!   parent: 'through2' }
npm ERR!
npm ERR! Please try running this command again as root/Administrator.

npm ERR! Please include the following file with any support request:
npm ERR!     d:\wwwroot\project\npm-debug.log

Note that I have run cmd as Administrator. If I run gulp after that, I get this:

d:\wwwroot\project>gulp
module.js:338
    throw err;
    ^

Error: Cannot find module 'laravel-elixir'
    at Function.Module._resolveFilename (module.js:336:15)
    at Function.Module._load (module.js:286:25)
    at Module.require (module.js:365:17)
    at require (module.js:384:17)
    at Object.<anonymous> (d:\wwwroot\project\gulpfile.js:1:76)
    at Module._compile (module.js:434:26)
    at Object.Module._extensions..js (module.js:452:10)
    at Module.load (module.js:355:32)
    at Function.Module._load (module.js:310:12)
    at Module.require (module.js:365:17)
    at require (module.js:384:17)

Any ideas? Anyone tried this on Windows yet? I've searched forums but the search yielded no results.