A flaw has been discovered in Internet Explorer that could allow criminals to take control of your computer. The malicious code to take advantage of the flaw could be already on as many as 10,000 web sites. So far game passwords have been stolen, but it is presumed it will be adapted to do far worse.
Microsoft has not yet released a patch. All versions of Internet Explorer are effected and it is recommended that you use another browser until the patch has been fixed.
Personally I would take this opportunity to become familiar with Firefox and consider using it or an alternative to IE permanently rather than go back to Microsoft’s browser.