I was trying to install node version controller when i ran into this..
this is my PC configuration

Thanks for help in advance..
As i could read from the comments, you are trying to install n because you wanna use KoA
But Koa itself has nothing to do with n. n is basically just a Support-Application which makes it easy for you to install and switch between whatever Node-Version you want by a single CLI-Command. Since you need Node > 0.11.x for KoA, they say on their page to install n so you can, after trying KoA, switch easily back to a stable Node-Version.
Im afraid you have no other option than manually downloading the latest Node-Unstable Version from their page and install it "by hand".