npm is is not recognized as an internal or external command, operable program or batch file

Question

I have small problem with npm and npx. When I run the following command:

npm -v

it prints the following:

CALL "C:\*******\node.exe" "C::\*******\\node_modules\npm\bin\npm-cli.js" prefix -g' is not recognized as an internal or external command,
operable program or batch file.
6.14.13

Node is in the PATH directories environment.