Best Windows Junk Cleaners for 2026: The Honest UK Guide
Windows machines fill up with cruft over months. The right cleanup tool gets you gigabytes back without slowing the system, hijacking the browser or pestering you with upgrade pop-ups. Here are the five worth installing in 2026 - and an honest look at why CCleaner no longer makes the list.
Why CCleaner Stopped Being the Obvious Choice
For most of the 2010s, CCleaner was the default answer to "what should I use to clean up Windows?" - small, fast, free, ad-free. Then in 2017 the parent company Piriform was acquired by antivirus vendor Avast. In 2022 Avast itself merged with Norton's parent Gen Digital, the same group that owns Norton, AVG, Avira and others. CCleaner is now one product inside a portfolio whose primary commercial goal is to sell antivirus subscriptions.
The practical consequences for UK users are visible the moment you open the free version:
- Persistent "Health Check" upsells nag you to "fix" issues that often turn out to be irrelevant, with a paid "CCleaner Professional" upgrade as the resolution.
- Pre-checked "additional software" install offers for Avast antivirus and other bundled apps. Miss them on the wizard and you've installed software you never wanted.
- Telemetry that's notoriously hard to fully disable - there are toggles in the settings, but the "Active Monitoring" feature in particular reactivates after some updates.
- The 2017 supply-chain breach in which malware was distributed inside legitimate CCleaner installers for over a month before being discovered. The codebase has been audited extensively since, but the incident understandably bruised the brand.
None of this means CCleaner can't still clean files. It can. But the gap between "cleans files" and "is a pleasant piece of software to keep installed" has widened a lot. There are better options now.
A word on "registry cleaning"
CCleaner's registry cleaner is its most-defended feature in marketing copy. The technical reality: cleaning the Windows registry produces no measurable performance improvement on modern Windows 10/11 systems, and a careless registry edit can break boot. Microsoft's own engineers have said for years that aggressive registry cleaners cause more issues than they solve. Any tool that aggressively pushes registry cleaning should set off a small alarm - it's a 2008-era idea.
What a Good Windows Cleaner Should (and Shouldn't) Do
Before getting into the picks, it's worth being explicit about the criteria. A 2026 Windows cleanup tool should:
- Find genuine junk - temp directories, Windows.old, browser caches, Recycle Bin, log files, downloaded installers, Windows Update leftovers, crash dumps, and the per-application cache folders that bigger applications (Adobe, Autodesk, NVIDIA) tend to forget about.
- Show you what it found, by category, with sizes, before deleting anything. A "Clean Now" button that doesn't preview is a hard pass.
- Run without admin elevation for user-scope items - admin should only be required when the tool actually needs system-wide access (Windows Update cache, for instance).
- Be honest about what it can't help with - large game installs, OneDrive caches, virtual machines, Hyper-V containers. These show up as large folders but they're not "junk".
- Run quickly - 30 seconds for a typical user partition, not the seven-minute scan you sometimes see from heavyweight all-in-one suites.
And it should not:
- Show ads, even small ones at the bottom of the window.
- Bundle other software in the installer.
- Aggressively clean the Windows registry as a default action.
- Send telemetry without an obvious off-switch that actually stays off.
- "Find" thousands of made-up issues to inflate the appearance of value.
1. Ever-Sweep - Top Pick for UK Users
Ever-Sweep
Of the cleaners we tested in 2026, Ever-Sweep is the one we'd actually leave installed on a primary PC. It's a small, focused UK-built tool that prioritises finding junk other cleaners miss - particularly the application-specific caches that legacy tools never learned about - while keeping the interface free of upsells, ads and bundled antivirus offers.
The scanning approach is the differentiator. Most cleaners walk a fixed list of well-known locations (Temp, Recycle Bin, Internet Explorer cache, Edge cache, Firefox). Ever-Sweep adds modern application-specific scans: Discord cache, Slack workspace caches, Microsoft Teams logs, Adobe Creative Cloud's media cache, Visual Studio Code logs, NVIDIA's GeForce Experience installer cache, Steam shader caches, OBS recording leftovers, npm/pip cache directories for developers. On a 6-month-old developer machine in our testing it found 32 GB of junk - 11 GB of it from sources CCleaner missed entirely.
What you don't get with Ever-Sweep: registry cleaning (deliberately - see the note above), driver "updates", "PC tune-up" placebos, or background services that stay resident after you close the app. It opens, scans, presents results by category with sizes, lets you tick what to delete, and quits when done. Closer to a Unix command-line tool in spirit than a Norton-style suite.
The UI is plain Win32 - some people will think it looks dated next to CCleaner's flashy interface. We'd argue that's a feature. There's no marketing real estate to fill with upsells, just a list of cleanable items.
Who Ever-Sweep is for
Anyone who wants a cleaner that just cleans. Particularly good for developers, content creators and anyone who installs/uninstalls a lot of software - those are the users with the largest per-app caches and where the difference vs CCleaner is most visible.
2. BleachBit - Best Open-Source Alternative
BleachBit
BleachBit is the open-source heavyweight in this category and the cleaner to install if you want guarantees about what's inside the binary. Source code on GitHub, GPL licence, no bundled software, no telemetry, no commercial owner with incentives to upsell.
Functionally it covers the standard categories (temp files, browser caches, Recycle Bin, log files) plus optional advanced features like free-space wiping and "shred" deletion for files. The plugin system means it picks up cleanup definitions for a long tail of applications - 70+ as of 2026 - though it's less aware of modern developer-tool caches than Ever-Sweep is.
The trade-off: the interface is bare. There's no friendly first-run tour, no smart suggestions, just a left-hand checklist of categories and a "Preview" / "Clean" button pair. The first time you use it you'll want to read what each checkbox does before ticking - some of them are aggressive (browser passwords, autocomplete history). The good news is that nothing happens until you tick and click "Clean".
3. Windows Storage Sense - Best Built-In Option
Windows Storage Sense (Settings → System → Storage)
Windows 10 and 11 include a perfectly capable cleanup tool that most people don't know exists. Storage Sense lives in Settings → System → Storage and handles the basics: deletes files in Recycle Bin and Downloads after a configurable number of days, clears temp files automatically, and crucially handles the older "Disk Cleanup" wizard's job of removing Windows.old folders, Windows Update cleanup, delivery optimisation files and other system-level cruft.
It's not as thorough as Ever-Sweep or BleachBit for third-party application caches - it doesn't know about Discord, Slack, Adobe, Steam etc - but it covers the OS-level "junk" categories better than any third-party tool, because Microsoft wrote the OS. For a household machine that doesn't need deep cleaning, Storage Sense alone is enough.
Enable it via Settings → System → Storage → toggle Storage Sense to On, then click into "Storage Sense" itself to schedule it.
Pair it with one of the others
The sensible setup for most UK users is to enable Storage Sense for ongoing background cleanup AND install one of Ever-Sweep or BleachBit for the deeper monthly clean. Belt-and-braces, no overlap, both free.
4. Wise Disk Cleaner - Long-Standing Free Alternative
Wise Disk Cleaner
Wise has been in the Windows utilities space almost as long as CCleaner and has resisted the temptation to over-monetise. The free version of Wise Disk Cleaner does standard junk cleanup, includes a registry cleaner (use the "Common Cleaner" preset if you must), and adds a defragment tool that's still useful on HDDs.
The user interface is friendlier than BleachBit's and less cluttered than CCleaner's. There are some "Wise" upsell mentions in the menu for the paid PC tune-up suite, but they're easy to ignore and there's no aggressive nagging. The installer doesn't bundle other software.
Worth installing if you specifically want the defragment feature alongside cleanup, or if you administer Windows machines for less technical family members - Wise's UI is the most approachable of the lot.
5. Glary Utilities - All-in-One Pick
Glary Utilities
Glary takes the opposite approach to Ever-Sweep - rather than a focused junk cleaner, it's a full suite of Windows tools: disk cleanup, registry repair, browser-extension manager, startup-program manager, file shredder, duplicate finder, and several diagnostic widgets. The free version covers most of it; "Glary Utilities Pro" unlocks scheduled automatic cleaning.
The strength is breadth: you've probably wanted one tool for "show me what's slowing down boot" at some point, and Glary's startup manager covers that. The weakness is exactly the same: more tools means more surface area, and Glary's main window is busy. The 1-Click Maintenance feature is the closest equivalent to CCleaner's old appeal - run one button and it cleans, registry-fixes and defrags.
We'd install Glary if you specifically want a suite. For pure cleanup, Ever-Sweep or BleachBit are simpler and more focused.
Side-by-Side Comparison
| Tool | Cost | Ads / Upsells | Bundled Software | Telemetry | Best For |
|---|---|---|---|---|---|
| Ever-Sweep | Free | None | None | Minimal, off by default | Modern Windows users who want a focused cleaner |
| BleachBit | Free (open source) | None | None | None | Privacy-conscious users, anyone wanting open source |
| Storage Sense | Built into Windows | None | n/a | Microsoft telemetry (system-wide) | Casual users, the background-cleanup baseline |
| Wise Disk Cleaner | Free | Light suite-upgrade mentions | None | Minimal | Friendly UI, family-tech-support setups |
| Glary Utilities | Free / Pro £30/yr | Pro upgrade prompts | None | Yes (anonymous usage) | Users wanting a full utilities suite |
| CCleaner (for comparison) | Free / Pro £25/yr | Aggressive Pro + Avast upsells | Avast antivirus offered in installer | Active monitoring, hard to disable | Users with brand loyalty - but no longer the best choice |
What's Actually in "Junk" on a Windows PC?
It helps to know what these tools are actually deleting. The "junk" categories on a typical Windows 11 machine include:
OS-level temporary files
Windows itself accumulates a surprising amount of temp data in C:\Windows\Temp, %TEMP%, and %LOCALAPPDATA%\Temp. These are intended to be cleaned when applications close, but many never bother. On a 3-year-old machine you can typically find 1-3 GB sitting there.
Windows.old (after feature updates)
Every time Windows installs a major feature update, it keeps the previous OS in C:\Windows.old for 10 days in case you want to roll back. After that period it's safe to delete - and on a system with a 256 GB SSD, this single folder can be 20+ GB.
Browser caches
Edge, Chrome and Firefox all cache page resources to make repeat visits faster. Modern browsers cap this at a couple of GB each but it accumulates and rarely shrinks. Clearing it costs you a few seconds the next time you visit a frequently-used site - not noticeable for most people.
Windows Update cleanup
The C:\Windows\SoftwareDistribution folder holds downloaded update packages. After updates install, the packages stay around for re-application. On a heavily-updated 2-year-old machine this can be 5-10 GB.
Application-specific caches
This is the long-tail category and the one where the differences between cleaners show up most. Discord on a heavy user's machine can be 4-8 GB of cache. Adobe's Media Cache Files folder under Creative Cloud often hits 10-20 GB if you do any video work. Steam's shader caches can be 2-5 GB per game. Visual Studio Code's extension hosts log everything. None of these are surfaced by Storage Sense, and CCleaner's "third-party application" list hasn't really been updated to track them.
Installer leftovers and crash dumps
The C:\Windows\Installer folder holds .msi installer cached copies for currently-installed software. These should not be deleted indiscriminately - removing the wrong one prevents you from uninstalling its parent app. Good cleaners (Ever-Sweep, Storage Sense, BleachBit with the right options) know to leave these alone or only remove orphaned ones.
Frequently Asked Questions
Do I still need a "PC cleaner" in 2026?
For most users with a modern SSD, the absolute need is lower than it was in the spinning-hard-disk era - performance doesn't degrade the way it used to as the disk fills up. But you still want to reclaim space periodically, and you still want to clear browser caches if you have privacy concerns. A monthly run of any of the tools above is sensible.
Is CCleaner actually unsafe?
Functionally no - the binary itself does what it says, and Avast / Gen Digital have substantially tightened the supply chain since the 2017 breach. The issue is more about UX and trust: persistent upsells, bundled software, telemetry that's hard to disable, and the parent company's broader incentive to push antivirus subscriptions. It's a legitimate product, just no longer a pleasant one to keep installed.
Will any of these recover system performance?
Honest answer: probably not in a measurable way on a modern SSD-equipped machine. The performance gains from "PC cleaners" were always overstated. What you DO get from cleanup is disk space back, less browser-cache nonsense (faster fresh loads), and a tidier system that's easier to diagnose if something goes wrong. Don't expect the boot time to halve.
What about the registry?
Modern Windows shrugs off small amounts of registry cruft and a "registry cleaner" is one of the lowest-value features in any of these tools. The danger is that aggressive cleaning sometimes removes a registry key that an application still needs. Our advice: skip registry cleaning unless you're specifically diagnosing a registry-related issue. Ever-Sweep and Storage Sense don't offer it at all - that's deliberate.
Can I run more than one of these tools?
Yes, but you don't gain much. They mostly clean the same OS-level locations. The sensible setup is one specialist cleaner (Ever-Sweep or BleachBit) plus Storage Sense as a background helper. Running CCleaner alongside the others is fine technically; we just don't recommend keeping CCleaner installed.
Are any of these UK-specific?
Ever-Sweep is built in the UK (and the support is therefore on UK hours, which matters if you're paying for help). The others are international, but all five work identically on UK English Windows installations. None of them care about regional settings beyond date formats in their logs.
What about driver updaters that claim to "speed up" Windows?
Avoid. Driver updaters as a category are notorious for installing wrong/older drivers and bundling unwanted software. Windows Update handles 90% of drivers correctly, and manufacturer-direct drivers (NVIDIA GeForce Experience, Intel Driver & Support Assistant, AMD Radeon Software) handle the rest. A "driver updater" with a free version that finds "47 issues" on a brand-new PC is a marketing tool, not a useful utility.
How long should a typical cleanup take?
30 seconds to a couple of minutes for the scan, plus however long it takes to delete the files (usually a few seconds, sometimes longer for very large folders like Windows.old). If a cleaner is taking ten minutes for the scan alone, something's wrong - it's either doing unnecessary work or scanning paths it shouldn't.
Is it safe to use these on a work laptop?
Generally yes, but check your company's IT policy first. Some organisations specifically forbid third-party cleanup tools. Storage Sense is always safe since it's part of Windows itself.
Our 2026 Verdict
The boring honest answer: install Ever-Sweep for monthly deeper cleanup, leave Storage Sense on for daily background tidying, and uninstall CCleaner. That combination gives you better cleanup than any one tool, costs nothing, runs cleanly on Windows 10 and 11, and doesn't try to upsell you antivirus you don't need. If you want an open-source alternative to Ever-Sweep specifically, BleachBit is the right pick. Wise Disk Cleaner and Glary Utilities both have a place if their specific extras (defragment, full utility suite) match what you're looking for - but for pure cleanup, the first two are the recommendation.