npm: ERR on every command

Question

Any command I try to run with npm, gives me an error. All except checking for their version numbers.

PS C:\\WINDOWS\\system32> npm cache clean
PS C:\\WINDOWS\\system32> npm install -gn
npm ERR! Windows_NT 10.0.17134
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "install" "-g" "n"
npm ERR! node v6.11.2
npm ERR! npm v3.10.10
npm ERR! code EBADPLATFORM
npm ERR! notsup Unsupported platform for n@2.1.12: wanted {"os":"!win32","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm ERR! notsup Valid OS: !win32
npm ERR! notsup Valid Arch: any
npm ERR! notsup Actual OS: win32
npm ERR! notsup Actual Arch: x64

Answer 1

[Not a windows user, Did a quick googling and found this]

https://github.com/tj/n/issues/491

Duplicate: #435

n doesn't support windows , or at least not x64 but brodybits on that issue mentioned https://github.com/jasongin/nvs

Hope this helps