Why do I get error when trying to install socket.io with nmp

Why do I get error when trying to install socket.io with nmp

References

Reference NO 1

http://stackoverflow.com/questions/15200184/why-do-i-get-error-when-trying-to-install-socket-io-with-nmp

Reference NO 2

http://stackoverflow.com/questions/17993105/error-on-installing-karma-test-runner

Reference NO 3

https://github.com/karma-runner/karma/issues/335

Reference NO 4

http://socket.io/

Reference NO 5

https://groups.google.com/d/topic/nodejs/zL6afUUQZMs

Reference NO 6

https://npmjs.org/

Reference NO 7

http://serverfault.com/questions/387689/cant-install-npm-cant-remove-npm-cant-access-any-commands-cant-install-co

Reference NO 8

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