MySQL Workbench asking for password
You will need to give root@localhost a password

Since you just installed mysql, you are running with default settings, this means you have no my.cnf. You will have to create one.

Run the following at a DIS Prompt

cd C:\Program Files\MySQL\MySQL Server 5.5
dir *.ini


There, you will see sample .ini files. Let's pick my-small.ini

net stop mysql
cd C:\Program Files\MySQL\MySQL Server 5.5
copy my-small.ini my.ini
cd data
del ib*
notepad my.ini


Once you open notepad, add this under the [mysqld] header

[mysqld]
skip-grant-tables


Close notepad and Save my.ini

Next, run these lines

net start mysql
mysql (hit enter)


You will get a mysql prompt. Now run this:

mysql&gt; UPDATE mysql.user SET PASSWORD=PASSWORD('mysecretpassword') WHERE user='root' AND host='localhost';
exit


Back at the DOS Prompt, do this:

net stop mysql
notepad my.ini


Once Notepad is open, delete the line skip-grant-tables from my.ini

Close notepad and Save my.ini

net start mysql


Once mysql is back up, test the password at the DOS prompt

mysql -uroot -p (hit enter)
Password: (type mysecretpassword and hit enter)


If you get the mysql prompt, CONGRATULATIONS !!! You installed a password for root@localhost

Go back to MySQL Workbench and user mysecretpassword as the password

Give it a Try !!!