Security Warning

Could somebody please tell me if there's a way to permenantly turn this incredibly annoying thing off? And I mean off for good and forever. It's alway popping up and quite frankly I'm about to tear my hair out!

use a decent browser?

IE8 isn't a decent browswer?

no it isnt. It fails to adhere to the W3C web standards so it doesnt render webpages properly, and it has more holes than a sieve. Using any version of IE is just asking for your computer to be compromised.