When entering commands on the command line, gulp throws an error. How to fix it?

Question

Node.js

After reinstalling Windows, Gulp stopped working. For any command, it gives -

npm : The name 'npm' is not recognized as the name of a cmdlet, function, script file, or executable. Check
the spelling of the name and the presence and correctness of the path, then try again.
string:1 character:1
+ npm i
+ ~~~
+ CategoryInfo : ObjectNotFound: (npm:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException

Node.js, gulp globally installed and Scope ExecutionPolicy set.
Scope ExecutionPolicy -list gives -

Scope ExecutionPolicy
----- ---------------
MachinePolicy Undefined
UserPolicy Undefined
Process Undefined
CurrentUser Undefined
LocalMachine Undefined

Answer 1

When I use PowerShell I get a similar error, try normal cmd