Okay, you should be able to go to like sound options and check if there are any effects checked, such as the Echo thing you are talking about. Just explore, you cant really mess anything up as long as you dont check things or save things. this way you can learn your new computer, trust me as bad as you want to play games it is advisable to KNOW your system, else you will be frustrated when playing games because you have to exit to fix things... hope this helps a little.