You can change root password using command line in wampserver or wampmanager, just follow the steps to change the root password.
- click on wampmanager, go to MySQL and Open the MySQL Console.
- By default the password in null (means no password). Just hit Enter
- Run the following sql command.
SQL Query to Change root Password in WAMP
mysql> update mysql.user SET password=password("new_password") where user="root"; hit enter
Your password updated and you will get Query OK message. Then click on the wampserver (bottom right) which is running in task bar and select Restart All Services.