Windows installation errors ! how to fix is

[realuserofgit]

while try intstalling devtools-terminal shows following errors

npm ERR! [email protected] install: node-gyp rebuild npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the [email protected] install script. npm ERR! This is most likely a problem with the pty.js package, npm ERR! not with npm itself. npm ERR! Tell the author that this fails on your system: npm ERR! node-gyp rebuild npm ERR! You can get their info via: npm ERR! npm owner ls pty.js npm ERR! There is likely additional logging output above.

npm ERR! System Windows_NT 6.1.7600 npm ERR! command "C:\Program Files\nodejs\node.exe" "C:\Program Files\nodejs\node_modules\npm\bin\npm-cli.js" "install" "-g" "devtools-terminal" npm ERR! cwd c:
npm ERR! node -v v0.10.22 npm ERR! npm -v 1.3.14 npm ERR! code ELIFECYCLE npm ERR! Error: EPERM, open 'c:\npm-debug.log' npm ERR! { [Error: EPERM, open 'c:\npm-debug.log'] errno: 50, code: 'EPERM', path: 'c:\npm-debug.log' } npm ERR! npm ERR! Please try running this command again as root/Administrator.

npm ERR! System Windows_NT 6.1.7600 npm ERR! command "C:\Program Files\nodejs\node.exe" "C:\Program Files\nodejs\node_modules\npm\bin\npm-cli.js" "install" "-g" "devtools-terminal" npm ERR! cwd c:
npm ERR! node -v v0.10.22 npm ERR! npm -v 1.3.14 npm ERR! path c:\npm-debug.log npm ERR! code EPERM npm ERR! errno 50 npm ERR! stack Error: EPERM, open 'c:\npm-debug.log' npm http 200 https://registry.npmjs.org/base64id/-/base64id-0.1.0.tgz

how to fix it