When you're installing Windows in a virtual machine or on old, slow hardware, you want the leanest, meanest and fastest-running configuration possible. Most of the time, you want the best from your operating system, including all the bells and whistles. Other times, you don't want the default, bloated Windows installation, with every single built-in feature slowing you down. Luckily, whether you want to put Windows on a diet in a virtual machine or you want to get Windows up and running all snappy-like on older hardware, you've got a handful of excellent and free options at your disposal. Let's take a look at a few ways to trim down your Windows installation so that it takes up less space on your hard drive and eats less RAM while it's running.