Windows Component Cleanup
Windows stores side-by-side component versions in the WinSxS component store so servicing, cumulative updates, language packs, and optional features can install, repair, or roll back reliably. Over time, superseded component payloads, obsolete manifests, old catalog references, and backup files from replaced updates accumulate there as newer packages take their place. Kudu performs Windows Component Cleanup against %WinDir%\WinSxS to remove superseded component store data that Windows no longer needs, without touching personal files, accounts, passwords, or current system components.
Why clean Windows Component Cleanup?
- Superseded update payloads remain in WinSxS after monthly cumulative updates, so the Windows folder keeps growing and users notice low disk space warnings even though they are not saving many files
- A bloated component store makes servicing operations scan more manifests and package metadata, which can show up as slower Windows Update install, longer 'Cleaning up' phases, or extended reboot times after patching
- Old component backups consume SSD space needed for pagefile growth, hibernation, and feature updates, so users may see feature upgrades fail with not enough disk space errors
- Large numbers of replaced assemblies and catalogs in the side-by-side store can lengthen DISM and system repair checks, which users experience as very slow health scans or servicing commands that appear stuck for a long time
- After many cumulative updates, superseded files that only exist for uninstall rollback provide little value but still occupy gigabytes, so users notice the largest directory on the system drive is WinSxS when checking storage analyzers
- Component store cleanup reduces package store sprawl that can complicate servicing state, and users often notice Windows Storage settings reporting less system-reserved usage after cleanup completes
Cache paths Kudu targets
Windows
%WinDir%/WinSxS |
Common questions about Windows Component Cleanup
Download Kudu and reclaim your disk space.
Available on Windows, macOS, and Linux. No account required, no feature gates, no telemetry without consent. All cleaning targets are open source and community-auditable.