Npm error ! while updating ionic ! and now ionic is broken

I had ionic 1.7.1 installed....... Today i decided to update it to 1.7.7... and it was taking forever to install spining the cursor... later i saw ionic was totally broken...

C:\Users\sd\Desktop>npm install -g ionic
npm ERR! Windows_NT 10.0.10240
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\sd\\AppData\\Roaming
\\npm\\node_modules\\npm\\bin\\npm-cli.js" "install" "-g" "ionic"
npm ERR! node v4.2.1
npm ERR! npm  v3.3.9
npm ERR! code ECONNRESET
npm ERR! errno ECONNRESET
npm ERR! syscall read

npm ERR! network read ECONNRESET
npm ERR! network This is most likely not a problem with npm itself
npm ERR! network and is related to network connectivity.
npm ERR! network In most cases you are behind a proxy or have bad network settings.
npm ERR! network
npm ERR! network If you are behind a proxy, please make sure that the
npm ERR! network 'proxy' config is set properly.  See: 'npm help config'
npm ERR! Windows_NT 10.0.10240
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\sd\\AppData\\Roaming
\\npm\\node_modules\\npm\\bin\\npm-cli.js" "install" "-g" "ionic"
npm ERR! node v4.2.1
npm ERR! npm  v3.3.9
npm ERR! code ECONNRESET
npm ERR! errno ECONNRESET
npm ERR! syscall read

npm ERR! network read ECONNRESET
npm ERR! network This is most likely not a problem with npm itself
npm ERR! network and is related to network connectivity.
npm ERR! network In most cases you are behind a proxy or have bad network settings.
npm ERR! network
npm ERR! network If you are behind a proxy, please make sure that the
npm ERR! network 'proxy' config is set properly.  See: 'npm help config'
npm ERR! Windows_NT 10.0.10240
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\sd\\AppData\\Roaming
\\npm\\node_modules\\npm\\bin\\npm-cli.js" "install" "-g" "ionic"
npm ERR! node v4.2.1
npm ERR! npm  v3.3.9
npm ERR! code ECONNRESET
npm ERR! errno ECONNRESET
npm ERR! syscall read

npm ERR! network read ECONNRESET
npm ERR! network This is most likely not a problem with npm itself
npm ERR! network and is related to network connectivity.
npm ERR! network In most cases you are behind a proxy or have bad network settings.
npm ERR! network
npm ERR! network If you are behind a proxy, please make sure that the
npm ERR! network 'proxy' config is set properly.  See: 'npm help config'
npm ERR! Windows_NT 10.0.10240
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\sd\\AppData\\Roaming
\\npm\\node_modules\\npm\\bin\\npm-cli.js" "install" "-g" "ionic"
npm ERR! node v4.2.1
 npm ERR! npm  v3.3.9
 npm ERR! code ECONNRESET
npm ERR! errno ECONNRESET
npm ERR! syscall read

npm ERR! network read ECONNRESET
npm ERR! network This is most likely not a problem with npm itself
npm ERR! network and is related to network connectivity.
npm ERR! network In most cases you are behind a proxy or have bad network settings.
npm ERR! network
npm ERR! network If you are behind a proxy, please make sure that the
npm ERR! network 'proxy' config is set properly.  See: 'npm help config'
npm ERR! tar.unpack untar error C:\Users\sd\AppData\Local\Temp\npm-1884-d7001498 
\registry.npmjs.org\liftoff\-\liftoff-0.12.1.tgz
npm ERR! tar.unpack untar error C:\Users\sd\AppData\Local\Temp\npm-1884-d7001498
\registry.npmjs.org\liftoff\-\liftoff-0.12.1.tgz
npm ERR! tar.unpack untar error C:\Users\sd\AppData\Local\Temp\npm-1884-d7001498  
\registry.npmjs.org\htmlparser2\-\htmlparser2-3.8.3.tgz
npm ERR! tar.unpack untar error C:\Users\sd\AppData\Local\Temp\npm-1884-d7001498
\registry.npmjs.org\plist\-\plist-1.1.0.tgz
npm ERR! tar.unpack untar error C:\Users\sd\AppData\Local\Temp\npm-1884-d7001498
\registry.npmjs.org\plist\-\plist-1.1.0.tgz
npm ERR! tar.unpack untar error C:\Users\sd\AppData\Local\Temp\npm-1884-d7001498
\registry.npmjs.org\glob\-\glob-4.0.6.tgz
npm ERR! tar.unpack untar error C:\Users\sd\AppData\Local\Temp\npm-1884-d7001498
 \registry.npmjs.org\glob\-\glob-4.0.6.tgz
npm ERR! tar.unpack untar error C:\Users\sd\AppData\Local\Temp\npm-1884-d7001498
\registry.npmjs.org\uglify-js\-\uglify-js-2.5.0.tgz
npm ERR! tar.unpack untar error C:\Users\sd\AppData\Local\Temp\npm-1884-d7001498
\registry.npmjs.org\uglify-js\-\uglify-js-2.5.0.tgz
npm ERR! tar.unpack untar error C:\Users\sd\AppData\Local\Temp\npm-1884-d7001498
\registry.npmjs.org\npm\-\npm-2.1.3.tgz
npm ERR! tar.unpack untar error C:\Users\sd\AppData\Local\Temp\npm-1884-d7001498
\registry.npmjs.org\npm\-\npm-2.1.3.tgz
npm ERR! tar.unpack untar error C:\Users\sd\AppData\Local\Temp\npm-1884-d7001498
\registry.npmjs.org\qs\-\qs-0.5.6.tgz
npm ERR! tar.unpack untar error C:\Users\sd\AppData\Local\Temp\npm-1884-d7001498
\registry.npmjs.org\qs\-\qs-0.5.6.tgz

I have good internet speed too !! even updated too latest npm..!!
Ionic lab works fine !!
Now how to install this ionic CLI .... please help !!

I hope this wont affect my existing ionic projects