Does this happen to everyone the computer keeps shutting down saying it`s to protect from something or other?

-i think it is windows that do it. It comes straight back on and says data protection and attempts at malicious add ons. i don`t understand. I have good norton protection is that enough?omg thar in trouble there lass, i ditched that norton 2 year ago, they charge you too took me ages to get my money back, you want one of them free ones Avast's ok or windows own anyhow give it a good scan and clean up for now be a virus owing to all them strange sites you visit xx Pops ...Sounds like the "DEP" is blocking something from inserting code into the system files, from an 'illegal' operation.

What browser are you using; and have you added anything new, like games, lately?
i agree with 'pops' he got mine put right but its microsofts own. you want.!
Yes. And it is happening very frequently with windows.
I'm ready to toss this computer into the lake out back....(Firefox too)......!!