Pauzinhos is right.
This all has been explained many times before on this board.
Please use the search option before asking.
It is not that we don't like you or are not willing to answer or something.
As Sherlock Holmes woulds say: "In contrary my friend, in contrary"
But having to answer questions that have been asked and answered many times before is getting borring/anoying for those who are trying to help others.
Besides, if you do some searching on thos webboard, avast's website and google, you can find answers to questions much faster than when you ask in here (or any other webboard) and have to wait till someone is responding