Answers:
This is what you need to do to make Yahoo! Mail your default email program. Follow the directions below and it will solve your problem.
Teach your computer to use Yahoo! Mail.
Using Internet Explorer just click "Continue" on the link below to download a small 60K file that will enable Yahoo! Mail to be the default email program for your computer. Whenever you click on an email address on any web page or in any computer program, Yahoo! Mail will open for you in a new window.
If Internet Explorer displays a yellow security bar at the top, click on it and select Install ActiveX Control from the menu.
If a security warning comes up with Yahoo! Inc. as the publisher, click Install.
Now you can click on an email address anywhere and your computer will automatically open up Yahoo! Mail for you.
You can even send documents directly from Word, Excel, or other Windows applications.
Requirements:
Windows 95 / 98 / ME / NT / 2000 / XP / Vista
Internet Explorer 4.0 or higher
http://help.yahoo.com/help/uk/mail/ext/ext-11.html
Update:
Internet Explorer 7 Beta3 optimized by Yahoo! is a great browser. Yahoo! Mail sure works great with it. I can be reading my mail in about 10 seconds after I sign in. I also had Firefox and it didn't work very good with Yahoo! Mail and a lot of other things. I will post the download link for Internet Explorer 7 Beta3 optimized by Yahoo! just in case you are interested.
http://downloads.yahoo.com/ie7beta/index.php
I also have Avant Browser and I think it is much better and faster than Firtefox.
http://www.avantbrowser.com/
You should also check out the links below.
http://mywebpages.comcast.net/SupportCD/FirefoxMyths.html
http://mywebpages.comcast.net/SupportCD/FirefoxMyths/Link_Bomb.txt
within your IE browser, Tools and internet options and programs tab.
If you don't see Yahoomail in the dropdown list, you may need to install yahoo messanger and toolbar.
go to yahoo.com. It will show a "Make yahoo your home page".However, I try to send cell phone videosa via a USB cable to pc, from pc, to Yahoo Mail, and it never works.