Computer NetworKING & System Administrator

After installation of the windows by default administrator account is disabled and we need to unchecked the option in Computer management to use the user of administrator account. I already  enable administrator account and disable the  admin user.. Unchecked the option from the account is disabled 

 You are connected as 'root' with no password, which corresponds to the default MySQL privileged account. Your MySQL server is running with this default, is open to intrusion, and you really should fix this security hole by setting a password for user 'root'.