Cleaner apps promise one-click speed and find a thousand "errors" on every PC they touch. Here is the honest grading — what each tool really does, and why the best cleaner is already installed.
Type "PC cleaner" into a search engine and every result promises a faster computer. Almost none of them will tell you the awkward truth: Windows already contains a safe cleaner, and the category's loudest products sell fear, not space. This scorecard grades the real options the way a technician would — by what they actually do.
Storage Sense, the Settings Temporary files page and classic Disk Cleanup (cleanmgr) clean every safe category in this series: temp files, thumbnails, shader cache, Recycle Bin, error reports. They know which files are locked, which categories are rebuildable and which are protected, because the same company wrote the operating system.
For the large majority of PCs, this is the whole answer. The honest gap: they do not touch third-party app caches (browser caches beyond a point, chat-app media caches). That gap is small, specific and closable by hand — a poor excuse to install a stranger's cleaner.
Every cleaner app eventually offers to fix your registry — hundreds of "errors" found in seconds. Here is the position that matters: Microsoft does not support or recommend registry cleaning utilities, and has stated they offer no measurable performance benefit. The registry does not slow down because it contains leftover entries; it is a database, and unused rows in a database cost nothing at runtime.
The risk side, though, is real: an over-aggressive "fix" can remove an entry something needed, and the failure appears days later in an unrelated program. A tool whose benefit is unmeasurable and whose risk is delayed breakage fails the technician test, whatever its download count.
Learn the costume and you will never fall for it: a free "PC speed test" that finds 1,247 problems on a healthy machine, counts every cookie as a threat, and unlocks the "fix" only after payment — sometimes with a phone number to call. That call is the real product, and it ends with a stranger asking for remote access or a card number.
Before installing any cleaner, ask one question: what does it clean that Settings does not? If the answer is registry errors, error counts or "optimisation" without a named cache, close the tab. If the answer is a specific app cache you actually have, clear that cache inside the app itself first — browsers, chat and editing apps all carry their own cache controls.
Nine PCs out of ten need nothing beyond the built-ins plus thirty seconds inside their browser. The tenth needs a diagnosis, not a download.
See every cleanup location opened live on a real PC, in the same safe order, step by step.
▶️ Watch Full VideoThe cache-cleaning part is broadly fine when you review the ticks yourself. Skip its registry cleaner — Microsoft does not recommend registry cleaning at all — and read installer screens carefully, since the free version promotes its paid tier. For most PCs the built-in tools make it unnecessary.
No. Those counts are a sales device — cookies and harmless leftover entries are labelled as errors. A healthy new PC does not have a thousand faults. Uninstall any tool that demands payment per error, and never call a phone number shown by such software.
Treat them the same way: drivers should come from Windows Update or the device maker's website. Third-party driver updaters are a common source of wrong drivers and paid upsells, and a wrong driver causes exactly the instability the cleaner claimed it would fix.