CCleaner is an awesome system cleaner program. There’s a free version anyone can use, but also CCleaner Pro that you have to pay for if you want more features.
Fortunately, you can use CCleaner Pro for free with a trial. But if you don’t want to install the trial to see how it works, click through this CCleaner Pro demo for an interactive look at everything you can do with it.
If you decide to buy CCleaner Pro, you’ll know exactly what you’ll be getting.
Tip: Click the yellow boxes to instantly jump to that screen in the program. See my review of CCleaner Pro for details on what everything means.