Free, open-source CCleaner alternative for Windows that tells you why your PC is slow - and never claims anything it did not measure. No registry cleaning, no telemetry, one portable exe.
open-source privacy csharp dotnet portable wpf free diagnostics debloat disk-cleanup boot-time windows-11 system-cleaner windows-cleaner no-telemetry startup-manager windows-utility no-subscription ccleaner-alternative pc-optimizer-alternative
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Updated
Aug 24, 2026 - C#