SUMFING WONG WIV COMPUTUR?

Sorry for the heading guys i'm just in one of those silly moods where your computer has been pissing you of all night,, ok guys , i can get on the internet and i can surf , but sometimes i get this message saying internet browser is shutting down , it's not one of those send error report things , all it says is that internaet browser is shutting down and windows will find the problem ,, it doesn't find it at all , all i get is some crap about data protection stuff ,,DEP , i've turned it off and on and the same thing happens , anyone fot a real genuine answer why? The right answerer will always get my questions first ,, and will be rewarded the points all the time. cheers guys , mucho helpo