nodejitsu windows installation error

err

npm ERR! Could not unpack C:\Users\Kevin Oh\AppData\Roaming\npm-cache\npm\1.1.16
\package.tgz to C:\Users\Kevin Oh\AppData\Roaming\npm-cache\npm\1.1.16
npm ERR! error installing jitsu@0.9.2

npm ERR! Error: EPERM, operation not permitted 'C:\Users\Kevin Oh\AppData\Roamin
g\npm-cache\npm\1.1.16\___package.npm\package'
npm ERR!
npm ERR! Please try running this command again as root/Administrator.
npm ERR!
npm ERR! System Windows_NT 6.0.6002
npm ERR! command "c:\\Program Files\\nodejs\\node.exe" "c:\\Program Files\\nodej
s\\node_modules\\npm\\bin\\npm-cli.js" "install" "jitsu" "-g"
npm ERR! cwd d:\
npm ERR! node -v v0.6.12
npm ERR! npm -v 1.1.4
npm ERR! path C:\Users\Kevin Oh\AppData\Roaming\npm-cache\npm\1.1.16\___package.
npm\package
npm ERR! code EPERM
npm ERR! message EPERM, operation not permitted 'C:\Users\Kevin Oh\AppData\Roami
ng\npm-cache\npm\1.1.16\___package.npm\package'
npm ERR! errno {}
npm ERR!
npm ERR! Additional logging details can be found in:
npm ERR!     d:\npm-debug.log
npm not ok