First off, I'm not very computer savy at all. I have an Acer Aspire 5720Z laptop with Windows Vista. When no programs are open on my computer, audio advertisments will play once in a while. How can I fix this? I've run Malwarebytes and it finds things everytime, yet the problem persists. Also, Malwarebytes pops up a message every once in a while that says "harmful programs have been detected" and then I'm given the option to quarantine or ignore. I have also run Trend Micro House Call with similar results. Thanks so much!