I recently came across the situation of IE crashing/closing on launch with no error pop-up. Setting the homepage to about:blank stopped this, but the tab crashed as soon a I tried to navigate away from that page. I tried launching with no add-ons and it worked fine, so I set about disabling them (almost) one by one - I disabled the accelerators all in one go, and disabling them fixed it. I have since re-enabled them one by one to see which one was causing it, but the problem has not re-appeared. Here's to hoping.
Still after such problems with IE8 i Prefer using firefox it works weell plus better speed..