A slow PC is frustrating, and dusting the machine or restarting it often doesn’t fix it. Junk files, leftover app data, heavy startup programs, and outdated drivers build up over time and drag your system down. Cleanup tools exist to deal with this.
Two names that have been around for years are CCleaner and iolo System Mechanic. I first wrote about these two programs several years ago, but both have changed significantly since then.
So, rather than simply updating the old comparison, I went back and looked at what both products currently offer. This updated guide covers what each one does today, what it costs, and who should chose which..
Quick verdict: Pick CCleaner if you mainly want to clear junk files, manage startup apps, and keep drivers and programs updated, and you want a free version that does real work. Pick iolo System Mechanic if you want a hands-off maintenance tool that also offers antivirus and password management in its higher plans, and you have several Windows PCs at home.
What Is CCleaner?
CCleaner, made by Piriform, started out as “Crap Cleaner” and is one of the longest-running system cleaners, first launched in 2004. It began as a Windows-only tool, got a Mac version in 2012, an Android version in 2014, and an iOS version nine years later. It is now owned by Gen Digital.
It clears browser history, cache, cookies, temporary files, and leftover data from many apps. It also includes a registry cleaner, an uninstaller, and a startup manager.
What’s New in CCleaner 7
CCleaner 7 arrived in October 2025 with a redesigned interface, light, dark and automatic themes, and support for ARM64 devices. Since then, updates have added more tools:
- A new uninstaller. It uses its own removal engine, supports batch uninstalls, clears leftover files, and lets you temporarily remove an app to test its effect on performance.
- Duplicate Finder. This is the renamed Disk Analyzer. It finds duplicate files in bulk and lets you keep the newest or oldest copy, and send files to the Recycle Bin or delete them permanently.
- A bigger Startup Manager. It now covers startup apps, Windows scheduled tasks, services, and right-click menu items.
- Cloud Drive Cleaner. It supports Google Drive, OneDrive and Dropbox, and since March 2026 it can also clean Gmail.
- Scheduled cleaning. Paid users can set up automatic cleaning schedules.
- Cleaning for AI apps. The September 2026 update added an AI Tools category in Custom Clean for junk files from apps like ChatGPT, Claude, Cursor, Gemini and LM Studio.
Other tools you may see inside the app are Health Check, Custom Clean, Performance Optimizer, Driver Updater, and Software Updater.
What CCleaner Can’t Do
CCleaner is not an antivirus. It does not detect or remove viruses, malware, or spyware, so you still need Windows Security or another antivirus running alongside it. It also isn’t a “real-time protection” tool. Its Pro plan can clean browser data automatically, but that is housekeeping, not protection.
Can You Recover Files CCleaner Deletes?
Usually not, and you shouldn’t count on it. Files removed in a standard clean are deleted, not parked in the Recycle Bin. Recovery tools can sometimes bring back ordinary deletions, but not files that were wiped on purpose. In Duplicate Finder, you can choose the Recycle Bin instead of permanent deletion, which is the safer option.
CCleaner System Requirements
CCleaner on Windows lists Windows 10 and later as its supported systems. My old claim that it works on Windows 7 and above is now only partly true: the company still releases maintenance updates on the older 6.x version for Windows 7 and 8 users. It has no Linux version, but it does run on Mac, Android, and iOS.
Is CCleaner Free?
Yes, there is a free version. It covers standard cleaning, privacy protection, and a basic Health Check. The paid plans are annual subscriptions, not one-time purchases. Current list prices are $44.95 a year for Professional (1 PC), $64.95 for Professional Plus (up to 3 devices, with Recuva Pro and Speccy Pro), and $89.95 for Premium (up to 5 devices, adding Kamo privacy app and 24/7 support). Discounts are frequent, so always check the updated pricing and checkout page before you buy. CCleaner also offers a 30-day money-back guarantee, and subscriptions can be cancelled to stop auto-renewal.
CCleaner’s Trust History
Be aware of the record. In 2017, a version of CCleaner (5.33) was compromised with malware that reached about 2.27 million machines. In 2018, an update drew criticism over data collection, and in 2020 Windows Defender briefly flagged the free version as a potentially unwanted app because of bundled software. The bundled offers are now optional during installation, but read each screen of the installer and always download from ccleaner.com.
What Is iolo System Mechanic?
System Mechanic is a Windows tune-up suite from iolo. It cleans junk, repairs system issues, and optimizes speed settings. Its higher plans add security tools. The current version is 26.5, released in June 2026, and it comes in Standard, Pro, and Ultimate Defense editions.
Main Features
- SmartScan. Finds hidden junk files, system problems, and wasted disk space, including leftovers from browsers like Opera.
- Smart ActiveCare. An AI-driven feature that learns how you use your PC and runs maintenance and repairs when the computer is idle. This is iolo’s automatic scheduling, and it is included in every edition.
- Performance tools. LiveBoost, RAMjet, NetBooster, and Startup Optimizer tune memory, CPU, internet settings, and startup programs. Version 25 added AppPrioritizer, which gives your most demanding apps more CPU resources.
- Advanced Uninstaller and Security Optimizer. These remove stubborn programs and patch Windows security gaps.
How the Editions Differ
The standard edition handles cleanup, repair, and optimization. Pro adds System Shield antivirus, Malware Killer, Search and Recover for deleted files, and DriveScrubber for secure erasing. Ultimate Defense adds Privacy Guardian and the ByePass+ password manager. ByePass+ is also available on iOS and Android. So unlike CCleaner, the Pro and Ultimate editions of System Mechanic include real antivirus and malware removal. The basic edition does not.
Requirements
System Mechanic runs on Windows 11, 10, 8.1, 8, and 7, but only on 64-bit PCs, not ARM-based ones. That is one area where CCleaner is more flexible.
Is iolo Free, and How Many PCs Can You Use It On?
There is a limited free version with basic cleanup and repair, but ActiveCare and most speed tools need the paid edition. The old claim that one license covers unlimited PCs is outdated. iolo’s own product page says one plan covers up to 10 PCs in a single household. Some third-party sellers still advertise “unlimited,” so check the terms.
How Much Does iolo Cost?
The full prices per year are $54.95 for System Mechanic, $74.95 for Pro, and $84.95 for Ultimate Defense, but iolo’s promo pages usually show steep discounts, such as $21.98, $29.98 and $33.98 for the first year. Watch the renewal price. The company offers a 30-day refund window, though eligible refunds may carry a 15% processing fee. There are also some complaints about frequent pop-up alerts pushing scans.
CCleaner vs iolo System Mechanic: Side-by-Side
| CCleaner | iolo System Mechanic | |
|---|---|---|
| Best for | Simple cleanup, startup and driver management | Automatic maintenance across several PCs |
| Free version | Yes, useful | Limited |
| Antivirus included | No | Pro and Ultimate Defense only |
| Scheduling | Yes, paid plans | Yes, Smart ActiveCare in all paid editions |
| Platforms | Windows, Mac, Android, iOS | Windows only (64-bit) |
| ARM64 PCs | Supported | Not supported |
| Devices per license | 1, 3 or 5 depending on plan | Up to 10 home PCs |
| List price (yearly) | $44.95 to $89.95 | $54.95 to $84.95 |
Which Should You Choose?
CCleaner is the better tool for most people.
The first reason is cost. The free version does real work, clearing junk, managing startup programs, and handling browser privacy, so you can see results before paying anything. With System Mechanic, most of the useful tools sit behind a paid plan. CCleaner’s list price is also lower, and you are not hit with a big jump at renewal.
The second reason is reach. CCleaner runs on Windows, Mac, Android, and iOS, and CCleaner 7 supports ARM64 PCs. System Mechanic is limited to 64-bit Windows, so if you ever switch devices, CCleaner goes with you.
It is also the tool that is moving faster. CCleaner 7 brought a redesigned look, a new uninstaller, Duplicate Finder, cloud drive cleaning, and even cleanup for AI apps. The old complaint that it looks outdated no longer holds. It is also less pushy than System Mechanic, which some users say keeps nudging them to run scans through frequent pop-up alerts.
System Mechanic does have real strengths. Smart ActiveCare maintains your PC automatically, and the Pro and Ultimate Defense plans bundle antivirus and a password manager. But that is a lot of software to pay for when Windows Security already protects your PC for free, and a person with one computer gets little from a 10-PC license. System Mechanic only makes sense if you look after several Windows computers at home and want one subscription to cover them all.
The one thing to keep in mind with CCleaner is its history. Download it only from ccleaner.com and skip any optional extras in the installer.
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