How to install ionic framework windows 7 system

cant install ionic framework on my windows system.its always showing following error

Error: npm WARN engine cordova-js@3.8.0: wanted: {“node”:"~0.10.x"} (current: {“node”:“0.12.0”,“npm”:“2.5.1”})
npm WARN engine npm@1.3.4: wanted: {“node”:">=0.6",“npm”:“1”} (current: {“node”:“0.12.0”,“npm”:“2.5.1”})
npm WARN engine xmlbuilder@2.2.1: wanted: {“node”:“0.8.x || 0.10.x”} (current: {“node”:“0.12.0”,“npm”:“2.5.1”}) how to fix my issues please help brothers and sisters…

try to update npm - to do this run “npm install -g npm”

thank you so much@bobrov1989

i tried still i am getting same error.even i installed Node.js latest version.Please anybody is tell me how to fix my error?