Not able to use drush

Problem/Motivation

This issue is not related to this module, but I need your help.

I have installed drush globally as well locally via composer by using following commands.

composer global require drush/drush

composer require drush/drush

When I run drush command, it says

[preflight] Package "drupal/core" is not installed

Any idea what is happening here. I have been looking for a solution for days. I have searched a lot, but nothing is working.

I am on windows 10.