not able to install socket.io

I installed "Windows x64 Installer: http://nodejs.org/dist/v0.8.3/x64/node-v0.8.3-x64.msi" of node , but when I try to install socket.io by typin "npm install socket.io" from my cmd which i started as admin I'm getting errors , please help me . I'm trying to install it for past 6 hours and have tested differe releases but getting same errors even with older releases .

>CreateProcessW: The system cannot find the file specified.
npm ERR! error rolling back Error: ENOTEMPTY, rmdir 'C:\pawan\gamedevelopment\no
detesting\node_modules\socket.io\node_modules\socket.io-client\node_modules\acti
ve-x-obfuscator\node_modules\zeparser'

full log here : http://pastebin.com/LiyhGZKN

one more thing I've not installed GIT on my system can that cause any problem I think this message may help to find the problem ,although I don't know what its saying

                          
npm ERR! Failed at the ws@0.4.25 install script.
npm ERR! This is most likely a problem with the ws package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     (node-gyp rebuild 2> builderror.log) || (exit 0)
npm ERR! You can get their info via:
npm ERR!     npm owner ls ws
npm ERR! There is likely additional logging output above.**

really sorry for bad formating