whenever I go online and click on yahoo, it will come with?

Yahoo is doing a major update to the site. Many people are getting the blank screen. Others are getting weird Error messages; others are asked to enter their password over and over. It is not your computer or browser.

You can not fix it.

This happened for 3 weeks during the July 2008 update. Then suddenly it worked fine.

I never use Internet Explorer anymore because of various security "issues", and the way that it tends to favour websites affliated to Microsoft.

Try Firefox, and in the address bar, type in:

http://uk.yahoo.com/

to get the Yahoo homepage, then carry on from there. I hope this helps.