Find what's filling your PC.
Clean safely.
Drive-by-drive NTFS analysis, interactive squarified treemaps, and deep intelligence for Visual Studio, NuGet, Docker WSL2, npm, and Steam shader caches. All cleanups route through the Windows Recycle Bin first.
See Your C: and D: Drives at a Glance
Instant volume discovery for NVMe SSDs, SATA drives, and external USB storage. Fast NTFS traversal with zero freeze.
System (C:) — 554.2 GB
NTFS • NVMe PCIe Gen4Games & Data (E:) — 398.4 GB
NTFS • Secondary SSDWhat's Actually Filling Your Windows PC?
It isn't just browser cookies. It is multi-gigabyte build artifacts, virtual disk images, package downloads, and pre-compiled shaders.
Visual Studio & .NET
Global NuGet package caches in ~/.nuget/packages, hidden .vs solution states, and diagnostic profiling memory dumps.
- NuGet Global Packages
- .vs Solution State Caches
- MSBuild bin & obj artifacts
Docker & WSL2
Virtual hard disk images (ext4.vhdx) that expand dynamically but never automatically shrink when files are deleted inside Linux.
- Docker Desktop ext4.vhdx
- WSL Distribution VHDX Compaction
- Dangling image layers
Gaming & Steam
Shader pre-caching directories, uninstalled game workshop mods, DirectX and VC++ redistributable installers left in game folders.
- Steam shadercache archives
- Orphaned workshop items
- Epic Games launcher vaults
Safety by Design on Windows
DiskWarren is engineered to prevent accidental data loss. We permanently write-block critical Windows OS directories (C:\Windows\System32, WinSxS, pagefile.sys, Registry hives).
Cleanups are sent to the Windows Recycle Bin using native Win32 APIs, allowing 100% reversible recovery.
Scanning and duplicate matching operate completely offline on your PC. No file paths or names are ever uploaded.
Windows Technical FAQ
Does DiskWarren require Administrator privileges?
No. Standard drive analysis, user temp cleanup, developer caches, duplicate detection, and personal file management run entirely under standard user permissions. Administrator elevation is only requested if you explicitly choose to clean system-wide Windows Update caches.
How does DiskWarren handle Docker and WSL2 virtual disks?
WSL2 and Docker create dynamic VHDX virtual hard disks (ext4.vhdx). Even if you delete Docker images inside Linux, Windows doesn't reclaim the host disk space. DiskWarren measures the actual physical size vs inside allocation and provides automated safe compaction instructions via wsl --compact.
Can I recover files deleted by DiskWarren?
Yes. All file cleanups route through the Windows Recycle Bin by default. You can open the Windows Recycle Bin at any time and click "Restore" to recover any item.
Ready to reclaim gigabytes on your PC?
Download DiskWarren for Windows. Fast, private, and designed for developers and power users.