WinCleaner cleans up full Windows drives without blindly deleting things. Instead of comparing file names, it detects duplicates via perceptual hashing — even when files were renamed or slightly changed.
The scan reads NTFS structures directly, which makes it much faster than a classic directory walk. Duplicates are not deleted but deduplicated via hard links: space is freed while every path keeps working.
Results end up in an HTML report with a treemap that shows at a glance where the space went.