Try
composer self-update
If this doesn’t work check your PATH variable, if it’s not there try searching composer.bat in windows and add it to your PATH variable. Normally, its in following path.
C:\ProgramData\ComposerSetup\bin
Try
composer self-update
If this doesn’t work check your PATH variable, if it’s not there try searching composer.bat in windows and add it to your PATH variable. Normally, its in following path.
C:\ProgramData\ComposerSetup\bin