CCleaner FAQ for free, safe, Windows 11 use

CCleaner is a long-standing proprietary Windows utility. It is safe when you preview Custom Clean results, keep exclusions for data you need, watch optional bundled offers during install, and download from a known source. Like any cleaner, it can permanently delete selected files.

Yes. CCleaner 7 supports Windows 11, Windows 10, Windows 8.1, and Windows 8 on 32-bit, 64-bit, and Windows on ARM. CCleaner 7 does not support Windows 7.

PC cleaners that delete many file types or change system settings can trigger heuristic alerts. Read the detection name, confirm the installer source and version, and review signature details when Windows provides them. A flag alone does not prove malware. See the antivirus guide for a short checklist.

Free covers core junk cleaning, Custom Clean, basic Health Check, startup tools, and related maintenance. Pro adds paid features such as Software Updater, Driver Updater, Performance Optimizer, Smart Cleaning, and related automation depending on the current plan. Exact menus change by version.

No. CCleaner is proprietary software published by Piriform / Gen Digital. Source code is not released under an open-source license.

Usually no for everyday maintenance. Most speed gains come from clearing temporary files and startup clutter. Registry cleaning is optional for advanced users; always review the analysis list and keep a restore point if you proceed.

Cloud Drive Cleaner is a CCleaner feature aimed at finding large or leftover files in connected cloud storage folders so you can free space. Availability and cloud providers depend on the edition and version you install.

Yes, depending on options you leave enabled. Features such as Smart Cleaning, monitoring, or update helpers can keep background components active. You can review Windows Services and CCleaner Options to reduce what stays resident.