I don't have the money to get a Mac, and I've tried many things including dumping my Microsoft Excel/Windows which took up much of the memory. The computer will run fine for awhile after I boot it, but it will start slowing down inevitably right when I'm in the middle of the process of going through a search list or other list so that rebooting it loses my place. And YouTube seems to be about the worst culprit. I've tried avoiding Norton, Macafee and other such programs that do what I call "taking over your computer". I hate anything that takes over my computer. Even the latest version of AVG went rogue and started taking over my computer and I got rid of it after using it for many years. And yes, I usually yell and cuss when I'm battling anything that's lagging my computer. It really pisses me off. I'm usually a very sedate, quiet person. And I avoid toolbars like the plague.