Change root password of mysql database This could be a Rookie problem , but it seems that i am not able to solve it.

I have MySQL server installed on my windows machine(MySQL 5.5) under the Admin username root.
Some How i lost the password of MySQL and want to change it , i m going through this link in order to solve it.
under c:> mysql-init.txt is :

UPDATE MySQL.user SET Password=PASSWORD('root') WHERE User='root';
FLUSH PRIVILEGES;


and on command line  

C:\Program Files\MySQL\MySQL Server 5.5\bin\mysqld --init-file=C:\\mysql-init.txt


it give an message like 'c:\program' is not recognized as internal or external command.

So basically i am stuck at point 6 of MySQL documentation. any help ??
Put the path in double quotes "....