How do I default to yahoo mail and not Outlook mailbox?

I recently downloaded microsoft business which included Outlook. I do not want my email to default to Outlook however since I have downloaded this microsoft software all my emails go directly into Outlook. How can I change this back to receiving all my email to my yahoo email.How do I default to yahoo mail and not Outlook mailbox?
To setup yahoo email as default using Internet Explorer.

* Download and install yahoo messenger.

* Click “tools”%26gt;“Internet Options”%26gt;”programs tab” in the menu.

* Make sure yahoo mail is selected under e-mail.

* Click OK. yahoo mail as default using IE is not compatible when using windows vista.



To setup yahoo email as default using Firefox 3 (Yahoo now recommend you use this browser) and it will work with Vista.

* Download and install firefox 3 http://downloads.yahoo.com/?p=win

* After installation and when you have Firefox 3 up and running, click ';tools';, then ';options';.

* In the options window that pops up, click the applications tab.

* Scroll down to “mailto” and change to “use yahoo mail”

* Finally click “OK”.