Npm 未安装

Question

I recently downloaded node.js from nodejs.org and installed it correctly on windows, from gitbash I ran node -v,it gave me a version number,but when I ran npm -v, I get bunch of error message like these;

Internal/module/cjs/loader.js:330
Throw err;

Error: cannot find module 'C:\Program Files\nodejs\node_modules\npm\node_modules\nom-registry-fetch\node_modules\fighy-pudding\index.js'. 
Please verify that the package.json has a valid "main" entry

And other bunch of errors...

How do I fix these please

Answer 1

Well, i tried alot of replies, still ended up the same. I reinstalled windows and installed the same nodejs.exe i downloaded and npm was installed...lol