Be careful when you install programs on your computer. “Be wary about what you install,†says Cargill. “Read everything in every window that it shows you.†For example, as you attempt to install a program, like Java or Flash, because a website says it needs them to run, be careful because it might encourage you to install an unnecessary program on your computer like Yahoo Toolbar, Google Desktop, or an anti virus software. Although they are not dangerous, these programs can take up memory space and slow your computer down even more.