How I make Opera as default browser (Opera 9)?

I know, stupid question, but I've been looking under the preferences thing for a while, and I can't find the option to put Opera 9 as default browser.

How I make Opera as default browser (Opera 9)?www.microsoft.com

sorry wont sound very helpful, but its under opera options, look harder

How I make Opera as default browser (Opera 9)?microsoft windows xp internet explorer

Stop that bran--err my crow.

Look harder
following these steps,

1,go desktop and right click on IE icon

2, and select program then you can see one check box named as

Internet explorer should check to see whether it is the default browser

3,select this check box and close this window

now opera should open then change default browser.

byeeeeeeeeeeeeeee.........
click properties on the start menu then on customize, then choose OPERA as the default browser for the internet