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CCleaner Pro

The world's most popular PC optimizer — clean junk, fix registry, protect privacy.

  • 4.5(18.4k reviews)
  • 💲$29.95/yr· free tier
  • Tested 2026-05-15
  • Updated 2026-05-15
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Our rating

7.8/10

  • Effectiveness
    9.0
  • Ease of use
    5.7
  • Value
    9.2
  • Features
    6.3
  • Trust
    9.0

Overview

CCleaner is the most widely-used PC optimization tool in the world, with over 200 million downloads. It cleans up junk files, fixes registry issues, and helps protect your privacy by removing browser tracking cookies and history.

The free version handles basic cleanup. CCleaner Professional ($29.95/yr) adds real-time monitoring, automatic updates, and scheduled cleaning — useful for non-technical users who want a "set and forget" solution.

It's a tool we recommend for users dealing with slow PCs, accumulated junk, or general system slowdown over time.

What it does

Key features

Junk file cleanup

Removes temp files, browser caches, log files.

Registry repair

Identifies and fixes broken registry entries.

Software updater

Updates installed apps automatically (Pro).

Privacy guard

Wipes browser tracking cookies and history.

Real-time monitoring

Pro: alerts when junk accumulates.

The honest take

Pros & cons

What we liked

  • +Used by 200M+ worldwide — proven track record
  • +Free version handles 80% of cleanup needs
  • +Easy interface for non-technical users
  • +One of the few tools with Microsoft trust

Where it falls short

  • −Push notifications nudge you to upgrade
  • −Some bundled offers in the installer (decline them)
  • −Aggressive registry cleaning can cause issues if misused
Solves these

Errors CCleaner Pro fixes

PerformanceBeginner

PC Running Slow

Why Is My PC So Slow? 8 Real Fixes That Work in 2026

15-30 minRead fix
PerformanceIntermediate

100% CPU Usage

Fix for 100% CPU Usage on Windows 10/11

10-20 minRead fix
FAQ

Common questions

Is CCleaner free?
Yes — the free version covers junk cleanup, registry fixes, and basic privacy. Pro at $29.95/year adds real-time monitoring and auto-updates.
Is CCleaner safe to use?
Yes when downloaded from the official site. CCleaner has been trusted for over 15 years. Avoid third-party download sites which may bundle malware.
Will CCleaner fix my slow PC?
It will help if junk files or registry bloat is the cause. For deeper issues like driver problems or malware, you'll need additional tools.
What's the difference between Free and Pro?
Pro adds real-time junk detection, automatic updates, scheduled cleaning, and priority customer support. Free covers all basic features.
Does CCleaner work on Windows 11?
Yes, CCleaner is fully compatible with Windows 10 and 11.
Bottom line

CCleaner Pro is one of our top picks.

Among optimizer tools we've tested, this is the one we install on customer machines most often. Used by 200M+ worldwide — proven track record

Try CCleanerNeed help installing? Talk to a tech

Trouble installing or using CCleaner Pro?

If the guide is not enough, describe the issue first. We will explain whether remote help is appropriate before any access is granted.

Talk to a tech

No automatic remote access.

  • DIY steps first
  • Permission before access
  • Hardware limits explained
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