Windows 11 · Windows
How to Detect & Remove Duplicate Files on Windows - Tutorial
Source-checked About 10 minutes
Answer
Group suspected duplicates by filename and size, then compare file hashes before treating them as identical. Keep one verified copy, move extras to the Recycle Bin instead of permanently deleting them, and confirm the remaining copy opens before emptying the bin.
Choose one narrow folder
Back up irreplaceable files, then start with one non-system folder such as Downloads or Pictures. Exclude Windows, Program Files, app data, cloud placeholders, and backup folders from bulk cleanup.
Group likely duplicates
In File Explorer, sort the chosen folder by name and size. Matching names or sizes are only candidates; renamed or resized files are not proven duplicates.
Compare file hashes
Open Windows PowerShell and run Get-FileHash separately on each suspected file using its exact quoted path. Treat files as content-identical only when the algorithm and full hash both match.
Choose the copy to keep
Open the matching files, verify that one good copy is in the intended folder, and preserve useful metadata or folder organization before moving anything.
Use recoverable deletion
Move only the confirmed extra copy to the Recycle Bin. Do not permanently delete both copies, use Shift+Delete, or clean application and system folders.
Verify before emptying the bin
Open the retained file from its final location and verify any application or project that references it. Keep the Recycle Bin unchanged until the remaining copy and backup are confirmed.
Legacy sponsored link (not part of this fix)
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Video walkthrough
If it does not work
- If the expected control is missing, update Detect & Remove Duplicate Files on Windows and confirm the account, platform, region, and eligibility before assuming the feature was removed.
- If the action changes currency, progress, or account access, stop and use official support instead of guessing from an older label.
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.