I get so frustrated when my PC is sluggish — how about you? I didn’t even realize the free WIndows Disk Cleanup tool came with my laptop! I get really concerned when I run a disk cleaner because I don’t want to lose files. This Windows system cleaner is really good, and doesn’t touch your personal files and photos. Here’s what you can expect if you use a disk cleaner for your PC, and what to do if you have a Mac.