Problem: When trying to run an Angular project using the "ng serve" command, you encounter an error that says "ng: The term 'ng' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again."
Solution: To resolve this error, open the command prompt and type "npm -i -g @angular/cli" to install the Angular CLI globally. Once the installation is complete, navigate to the project directory and run the project using "ng serve" command. This should allow you to run your Angular project without encountering the "ng is not recognized" error.