25 Best PC Cleaner for Windows 10/8/7 (Free & Paid) 2020

A smart cleaning tool for a better-running computer.

Freshly-Installed Waterfox Dies in Seconds, Every Time about about 1 year ago

The CleanMyPC app scrubs the relevant registry when it uninstalls other apps. But your prescribed step 3 (scanning registry for "waterfox" after uninstallation & restart) did yield an escaped entry with "waterfox" in the entry (path/address), so I deleted it before restarting and installing.

CCleaner cleans, speeds up and frees up space on business endpoints.

Free optimization software & registry cleaner for Windows 10, 8, 7, Vista and XP. Advanced SystemCare Free to speed up PC, clean registry and repair system in one click.

Advanced System Optimizer. Advanced System Optimizer is the most powerful cleanup and optimization software for Windows 10/8. 1/8/7/Vista and XP. We've been developing Windows performance software since 1999.

freemium $29.95 / Annually

Auslogics BoostSpeed: Tune up Your PC for Peak Performance! . * Free trial lets you clean out junk files, enable several Live Speedup tools and run each of the 18 apps under All Tools once.

Wise Care 365 is a bundle of important registry, disk, and other system utilities for your PC.

Norton Utilities improves your PC's performance and startup time by repairing common PC issues...

Some users swear by it, some call it a glorified snake oil that does more harm than good. That can be said about any snake oil, but what specific brand of snake oil can boast almost a billion downloads around the world?

Registry errors can make your computer slow and unstable.

Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode

Ashampoo WinOptimizer Free – Speed up your system.

The No. 1 Free, Powerful and All-in-one utility for cleaning your PC

A system optimization and cleaner tool.

Great for PC Techs. Inexpensive and Portable. The PC Decrapifier can help you speed up that process, saving you lots of time! Just run it right off a portable USB drive. There's nothing to install!

System Mechanic uses patented technology to help fix PC errors and restore speed. The software is compatible with multiple versions of Microsoft Windows.

A free all-in-one software which gives you the best gaming experience, featuring best gaming deals, PC and Mobile Game Booster, and more!

With a single click, JetClean gives you that fresh, new PC feeling again! Lightweight and easy to use, JetClean removes system junk files and improves your PC performance.

When your computer is getting full, BleachBit quickly frees disk space.

Uh what?? about 7 months ago

Your WaPo article about Bleachbit is HILARIOUS. They literally are saying the claim is she poured bleach on her drives????? bleachbit.org/ Its a program designed to permanently remove things on your HD - which isnt as easy as many think.

Comodo System Utilities is a registry cleaner, repair and registry fixer applications for Windows operating systems.

Top-rated PC utility software to clean, update, maintain and protect your PC for good. Free Download for Windows and Mac.

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Avira System Speedup is one of many device optimization programs offered by Germany based Avira Operations GmbH & Co.

Next generation tuneup and cleanup for your PC

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