尝试修复NPM安装前缀-g'时出错，无法识别为内部或外部命令

Question

C:\Users\kunal mourya>npm -v
'CALL "C:\Program Files\nodejs\\node.exe" "C:\Program Files\nodejs\\node_modules\npm\bin\npm-cli.js" 
  prefix -g' is not recognized as an internal or external command,
operable program or batch file.
6.14.5