I followed this answer not realizing that MySQL is already started in my computer. will that affect anything and how can I delete it?
https://stackoverflow.com/a/24548331/14105177
Looks like the MySQL server is not started. Look to the official documentation of MySQL how you can start a service under windows.
Install the server as a service using this command: C:> "C:\Program Files\MySQL\MySQL Server 5.5\bin\mysqld" --install