Recently I download Internet Explorer 8 and I keep having problems with it.

When I rightclick something, an error message will pop up saying that Internet Explorer has encountered a problem and needs to close. I will never be able to open that link in a new tab.

I don't know if this has to do with anything, but I cannot seem to go to Yahoo. I set it as my homepage but whenever I open Internet it says it is not a valid page even though I type in www.yahoo.com

Help me please.