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Error Prefix -g Windows 8.1

Hello, I’m new to nodeJs and npm, but I used it for small applications, everything worked fine, when suddenly I want to raise my application with npm start and send me error, check the node and npm versions and in npm I get this…

"CALL “C:\Program Files\nodejs\node.exe” "C:\Program Files\nodejs\node_modules
\npm\bin\npm-cli.js" prefix -g" no se reconoce como un comando interno o externo
programa o archivo por lotes ejecutable.

uninstall and delete everything related to node and npm, and the environment variables, and the error persists.