Use Cleanup recommendations and Storage Sense, review each category before removal, and move personal files rather than deleting unknown system folders.
Before changing Windows C drive cleanup, record free space, review Cleanup recommendations and temporary-file categories, and protect Downloads, cloud-only files, archives, and recovery data. Keep the current state, exact message, and any recent change available so each result can be compared.
2
Choose the supported path
Use Storage Sense and supported app uninstall controls; do not manually delete unknown Windows, installer, WinSxS, or user-profile folders.
3
Review storage use
Open Settings > System > Storage and identify the largest categories before deleting anything.
4
Use Cleanup recommendations
Review temporary files, large or unused files, cloud files, and unused apps. Select only items you understand.
5
Configure Storage Sense
Turn on Storage Sense and choose explicit schedules for Recycle Bin, Downloads, and cloud content.
6
Move personal files
Move large files you want to keep to external storage or use OneDrive Files On-Demand.
7
Verify the result
Restart Windows, return to Settings > System > Storage, and confirm free space increased. Open a few files you kept, including any cloud placeholders, before emptying backups or external copies.
8
Troubleshoot Windows C drive cleanup
If free space immediately disappears again, use Storage categories to identify what grew. Stop cleanup if Windows reports disk errors or proposes files you cannot restore; keep the category name, before-and-after free space, and any error before contacting Microsoft Support.
Video walkthrough
ⓘ Sources and verification
Checked against official documentation on . Scope: Windows.
Follow the linked first-party guidance if labels differ after a platform or app update.
