Thanks for answering, yesterday i downloaded the kaspersky trial version and right now i'm downloading a game and my download speed has increased to 64 kb/s,(the normal is 100 kb/s) but as zalternate said my system slowed down and it has detected 2 troyans until now so, i think i'm gonna try avast, and Do you think i should install avast and Malwarebytes or only avast?, and Do think i should continue with the online scan or only with avast??