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v3.2.0 Latest Stable Release • Deep Root Uninstaller & AI Intelligence

Deltempo — Pure Windows Cleaner.
NT Memory & Deep Cache Reclaim.

Deltempo is a fast, portable, open-source Windows cleaner and NT memory optimizer application. Safely cleans disposable caches, GPU shader caches, and flushes standby RAM without touching personal data — zero telemetry, no background bloat, and 100% source code transparency.

Download Deltempo ▶ Watch Video (22s) View on GitHub
✓ 5-Tier Safety Engine
✓ NT Kernel Memory Optimizer
✓ Deep Root Uninstaller & Leftovers
✓ Zero Telemetry & 100% Offline
✓ 1275 Passing Tests
App Icon Deltempo STANDALONE
64-bit Windows
Volume-Aware Parallel Engine (v2.0.0)
Target Scopes Verified by Protection Policy
14.8 GB
🎮
DirectX & GPU Shaders
NVIDIA, AMD, Intel & DirectX shader bytecode. Purges compiled caches safely.
📁
Windows & User Temp
User %TEMP% & System Temp files past the 24-hour protection shield.
📦
Delivery Optimization
Windows Update peer-to-peer cache chunks and update staging leftovers.
⚙️
Developer Caches
npm, pip, NuGet, Cargo, Bun & Gradle build cache trees (100% credential protected).
💬
Messaging Media Scratch
Volatile media caches for Discord, Telegram & WhatsApp. Session tokens strictly protected.
🌐
Browser Disk Caches
Edge, Chrome, Brave & Firefox HTTP caches. Passwords, cookies & logins untouched.
Ready • Volume-Aware Parallel Coordinator Active • 26 Scopes Verified
NT Kernel Memory Optimization
Working Set Trimming & Standby List Purge
76%
RAM LOAD
12.2 GB / 16.0 GB (5.8 GB Standby)
STANDBY LIST PURGE
ntdll!NtSetSystemInformation

Reclaims inactive standby pages cached by closed games and apps.

WORKING SET TRIM
psapi!EmptyWorkingSet

Safely trims bloated background processes while shielding Windows OS core.

Transparent Disk Consumption
Large File Hunter with Recycle Bin Undo Safety
♻️ Windows Recycle Bin Protected
📁 C:\Users\Admin\Downloads\UnrealEngine-5.4-Setup.exe 8.4 GB
📁 C:\Users\Admin\AppData\Local\NVIDIA\DXCache\dx_48102.bin 2.1 GB
📁 C:\Windows\Temp\stale_driver_package.cab 1.6 GB
Boot Acceleration
Startup Manager with Core OS Process Immunity
🛡️ Windows Defender & Security Protected
Discord Registry HKCU
🤖 AI Verdict: SafeToDisable • Won't affect voice or messaging when launched manually
HIGH IMPACT ENABLED
Spotify Startup Folder
🤖 AI Verdict: SafeToDisable • Disabling cuts ~1.8s boot delay
MEDIUM IMPACT ENABLED
Windows Security Tray Registry HKLM
🛡️ AI Verdict: EssentialKeep • Protected core Windows security component
CORE OS PROTECTED
Active Memory Inspector
Heavy Background Process Trim & Management
Filtering processes > 20 MB
🌐 msedge.exe (PID 14208)
842 MB TRIMMED
🎮 steamwebhelper.exe (PID 8904)
418 MB ACTIVE
Autonomous Integrity Engine
Windows Servicing Stack & Corruption Repair
🛡️ DISM & SFC Servicing Stack
SFC Scannow

Scans and repairs corrupted system files.

✓ Healthy
DISM Component Store

Restores corrupted Windows system packages.

✓ Ready
WinSxS Scavenge

Purges superseded component versions.

Reclaims ~4 GB
Deep Root App Uninstaller • v2.0.0
Silent Batch Removal & Residual Leftover Sweeper
🛡️ Deep Root Tracing Restore Point: Optional (Off by Default)
🔍 Filter 78 installed applications...
🎮
Epic Games Launcher
Epic Games Inc. • 1.84 GB • Win32 Registry
14 LEFTOVERS FOUND HKCU + AppData
💻
Microsoft Visual Studio 2022 Preview
Microsoft Corporation • 14.2 GB • ProgramData Residuals
82 LEFTOVERS DETECTED ProgramData + Registry
🎵
Spotify Music Desktop
Spotify AB • 312 MB • Roaming AppData
CLEAN STATE Safe Removal Ready
💡 Expandable Application Intelligence

Deltempo deep-scans AppData, ProgramData, and registry keys for orphaned leftovers after silent uninstallation. Pre-deletion revalidation guarantees zero collateral damage to adjacent developer or user files.

Synchronous Console Binary (v2.0.0)
Click Commands to Test Live Output
$ deltempo status

>>> Deltempo System Telemetry (v2.0.0)
  OS Platform: Windows 11 Pro 64-bit (24H2)
  Privileges: Standard Invoker (Restart Manager available)
  Physical Memory: 15.9 GB total | 5.2 GB active | 5.8 GB standby
  Storage: C:\ (NVMe) 84.2 GB free / 512.0 GB (83.5% Used)
  Status: Ready for optimization
Official Launch Film • 22 Seconds

See Deltempo in motion.

Zero telemetry. 14.8 GB purged in seconds. Native NT kernel standby memory trim. Watch the open-source Windows guardian in action.

1080p · 30fps 22s Fast Tour Zero Telemetry
Get Deltempo free
Interactive Reclaim Estimator

See how much storage & RAM you get back.

Select your usage profile to see an accurate simulation of reclaimable junk data and flushed standby memory.

Estimated Reclaimable Junk
32.4 GB

Cleans massive DirectX, NVIDIA, AMD, and Unreal Engine shader caches plus game installer dumps.

Standby RAM Recoverable
4.8 GB

Flushed via native NT kernel system information classes in under 50 milliseconds.

DirectX & GPU Shader Caches High Density
Temp & Scratch Data (>24h Old) Verified Disposable
Package & Build Staging Safe Clean
Core Principles

Built for trust, speed, and safety.

Deltempo is built for users who want to clean disposable Windows data without worrying about broken apps, deleted passwords, or intrusive telemetry.

🧹

Clean What Matters

Removes disposable Windows caches, GPU shaders, crash dumps, and installer leftovers without touching personal files, documents, or browser saved credentials.

⚡

NT Kernel Memory Optimization

Uses native Windows NT APIs to safely trim process working sets, flush filesystem cache pages, and purge the standby list without terminating active applications.

🔒

No Telemetry & Local Operation

Runs locally on your computer. Contains no analytics tracking, advertisements, or background telemetry. Routine scan and clean operations run entirely offline; update checks query GitHub only when invoked.

🛡️

Deterministic Safety Architecture

Files are evaluated against an immutable protection policy, path boundary rules, and a recent modification shield before anything is deleted.

📦

Portable Single-File Binary

Self-contained executable. No installer required, no background services lingering in Windows, and no leftover background daemons.

📖

Open Source (MIT)

Every single line of C#, XAML, and build scripts is open for inspection on GitHub under the permissive MIT license. Backed by 1275 automated verification tests, all enforced green by a coverage-gated CI pipeline.

Competitive Matrix

Deltempo vs. Industry Alternatives

How Deltempo compares technically with CCleaner, BleachBit, Bulk Crap Uninstaller (BCU), and Windows Storage Sense.

Feature / Capability ⚡ Deltempo (v3.2.0) CCleaner BleachBit Bulk Crap Uninstaller
License & Source ✓ 100% MIT Open Source
C# & modern .NET, 1275 tests		 ✕ Proprietary
Closed source / Gen Digital		 ✓ GPLv3 Open Source
Python GTK codebase		 ✓ Apache 2.0
C# WinForms
Telemetry & Privacy ✓ 0 Telemetry / Offline
100% local, zero tracking IDs		 ✕ Heavy Telemetry
Active tracking & upsell popups		 ✓ Zero Telemetry
Local execution only		 ✓ Zero Telemetry
Manual check updates
Cache & Junk Scopes ✓ 26+ Verified Scopes
GPU Shaders, Dumps, Delivery Opt		 △ Basic Temp & Registry
Misses GPU shader bytecode		 ✓ Deep App Cleaning
XML-driven app cleaners		 ✕ Uninstaller Only
No disk/cache cleaners
Deep Root Uninstaller ✓ Built-In Deep Sweeper
Sweeps AppData, registry & shortcuts		 △ Standard Uninstall
Leaves residual files & keys		 ✕ No Uninstaller
Cache wipe only		 ✓ Advanced Uninstaller
Deep quiet batch uninstallation
System Restore Points ✓ Optional (Off by Default)
User toggle, zero surprise freeze		 ✕ Persistent Prompts
Nag screens & warnings		 ✕ Not Supported
No restore integration		 △ Auto / Dialog Prompts
Prompts on each removal
NT Kernel Standby Memory ✓ Native NT APIs (<50ms)
Flushes standby list without kill		 ✕ Placebo Optimizer
Freezes apps or fakes RAM		 ✕ Not Supported
No memory optimization		 ✕ Not Supported
No memory management
Safety & Protection ✓ 5-Tier Engine + TOCTOU
Pre-delete recheck + 2-Phase Safety		 ✕ Risky Registry Edits
Blind wildcard deletes		 ✓ Regex Exclusions
Safe path exclusions		 ✓ Confidence Ratings
Certificate & safety rating
Visual Design & RTL ✓ Fluent Glass & Arabic RTL
Obsidian / Porcelain eye-comfort		 ✕ Ad-Cluttered Legacy
Annoying upgrade banners		 △ Legacy GTK Linux Port
Dated utility styling		 △ Dense WinForms
Complex spreadsheet layout
Pricing & Upsells ✓ 100% Free Forever
Zero ads, zero subscriptions		 ✕ $29.95/yr Subscription
Features paywalled in Pro		 ✓ Free (GPLv3)
Donation supported		 ✓ Free (Apache 2.0)
Donation supported
Safety First

Designed to clean aggressively — without being reckless.

Most PC cleaners operate as black boxes. Deltempo uses an explicit two-phase planning architecture to verify every single file before touching disk.

STEP 01
Scan
Identifies candidate disposable files across 25+ scopes
→
STEP 02
Plan
Builds candidate transaction plan without modifying disk
→
STEP 03
Protect
Enforces protection policy & recent file safety shield
→
STEP 04
Revalidate
Mitigates TOCTOU risk by re-checking canonical path, bounds, and attributes immediately before delete
→
STEP 05
Clean
Executes verified deletion or safe Recycle Bin transfer

Formal 5-Tier Safety Classification

Every candidate path is categorized deterministically into one of five verified tiers:

PROTECTED (Score: 0)
Immutable

System32, WinSxS, bootmgr, user documents, SSH keys, cloud credentials, browser password databases, and active messaging session tokens.

SAFE (Score: 90–100)
Verified Disposable

DirectX/NVIDIA/AMD shader caches, Windows Delivery Optimization chunks, Windows Update downloads, and driver package leftovers.

LOW RISK (Score: 70–89)
Aged Leftovers

Downloaded standalone installers older than 48 hours located in standard temp and staging download directories.

REVIEW (Score: 30–69)
Review Required

Active temporary files modified within 24 hours or executables detected in non-standard temporary folders.

UNKNOWN (Score: < 30)
Preserved

Conservative default fallback: unclassified files are permanently preserved without modification.

Capabilities

Complete suite of Windows maintenance tools.

Organized cleanly into three functional pillars: Clean, Optimize, and Control.

🧹 CLEAN
  • ✓
    Duplicate File Finder: 3-stage SHA-256 byte-level duplicate scanner with system path protection.
  • ✓
    GPU Shader Caches: Purges DirectX, NVIDIA, AMD, and Intel shader caches safely.
  • ✓
    Windows & User Temp: Cleans temporary directories past the 24-hour safety shield.
  • ✓
    Delivery Optimization: Cleans peer-to-peer Windows Update cached chunks.
  • ✓
    AppData Footprint Report: See exactly what is occupying AppData, largest first. Strictly read-only — there is no delete button, by design. Also detects data left behind by uninstalled Microsoft Store apps.
  • ✓
    Developer Caches: Reclaims build directories from npm, pip, NuGet, and Cargo.
  • ✓
    VSS Shadow Copy Pruner: Enumerate system restore points and prune obsolete snapshots safely.
  • ✓
    Messaging App Scratch: Purges media caches for Discord, Telegram, and WhatsApp.
  • ✓
    Browser Disk Caches: Cleans HTTP caches for Chromium and Firefox browsers.
⚡ OPTIMIZE
  • ✓
    Squarified Treemap: Interactive hierarchical storage visualizer mapping space hogs instantly.
  • ✓
    Standby List Purge: Reclaims standby memory pages via NtSetSystemInformation.
  • ✓
    Working Set Trim: Trims private working sets across running applications.
  • ✓
    System File Cache Reset: Flushes excessive file cache working sets safely.
  • ✓
    Global Hotkey: Press Ctrl+Shift+M anywhere for instant 1-click memory flush.
  • ✓
    OS Process Shield: Core processes (csrss, dwm, explorer) are shielded.
  • ✓
    DISM & SFC Integration: One-click Windows Component Store health check and repair.
🛡️ CONTROL
  • ✓
    Deep Root App Uninstaller: BCU engine with silent batch removal and leftover file/registry sweeper.
  • ✓
    Task Scheduler & Context Menu: Automated scheduled cleanups and 1-click Explorer right-click cleaning.
  • ✓
    Low Disk Shield: Background tray guardian telemetry warning when free disk space is critical.
  • ✓
    Startup AI Safety Verdicts: AI intelligence answering "Will anything go wrong if I disable this?".
  • ✓
    Large File Hunter: Inspect large files with Recycle Bin undo protection.
  • ✓
    Synchronous CLI: Native console executable for PowerShell and script pipelines.
  • ✓
    CTT WinUtil Integration: 1-click link to the official Chris Titus Tech Windows Utility page — Deltempo never runs it for you.
  • ✓
    Continuous Patch Delivery: Safe rolling updates with SHA-256 and PE header verification.
  • ✓
    Multi-Language (in progress): Language selector for English, Arabic, Spanish, French, and German. The Cleaner workspace is localized and Arabic gets native RTL flow; modals and the remaining workspaces are not yet translated.
Workflow

How Deltempo Works

Three simple steps give you complete confidence in what gets cleaned.

01

Scan

Deltempo scans selected scopes without touching anything on disk. It calculates candidates and identifies disposable cache structures.

02

Review

See exactly what was found by category and safety tier. Protected directories are locked out, and simulation mode lets you preview actions safely.

03

Clean

Applies the cleanup plan with pre-deletion revalidation. Files are either permanently unlinked or moved safely to the Recycle Bin.

Transparency

System Requirements & Limitations

Clear facts about what Deltempo requires, what it modifies, and its operational boundaries.

PLATFORM SUPPORT
64-bit Windows 10 & 11 Only

Deltempo is built for win-x64 architecture. Legacy 32-bit Windows and older releases (Windows 7/8.1) are not supported.

ADMIN ELEVATION
System Scopes Require UAC

User temp and caches clean without elevation. OS-level scopes (Windows Temp, Prefetch, Servicing logs) require running as Administrator.

FILE LOCKS
Win32 Restart Manager Engine

Files held by running apps trigger native rstrtmgr.dll inspection to identify locking processes (PID and application title) and schedule deferred boot-time removal.

MEMORY REALISM
Cache Recovery, Not Magic Hardware

Memory trimming flushes standby and working set pages to free pools; it does not expand physical RAM or guarantee higher frame rates.

Built in the open. Fully verifiable.

Inspect the source code. Review the cleanup rules. Verify every release checksum. Deltempo requires no account, collects no telemetry, and operates transparently.

📄 MIT Licensed
🔒 No Telemetry
🛡️ 1275 Automated Tests
🔑 SHA-256 Checksums
Explore Source on GitHub Read Security Policy
FAQ

Deltempo Frequently Asked Questions

Straight answers to practical questions about Deltempo's architecture, safety, and operation.

Deltempo is a portable, 100% open-source Windows cleaner, deep uninstaller, and NT memory optimizer. Unlike proprietary utilities like CCleaner, Deltempo operates with zero telemetry, zero analytics tracking, and zero background daemons. It cleans 26+ verified cache scopes including GPU shaders, uninstalls software with residual leftover sweeps, trims RAM with native NT kernel APIs, and uses a deterministic 5-tier safety engine.
No. Deltempo respects your system resources and choices. In the Deep Root App Uninstaller, restore point creation is an optional toggle that is turned off by default. If you prefer to have a checkpoint before removing an app, simply check the box in the GUI or pass the --restore-point flag in the CLI.
Deltempo uses a high-performance 3-stage duplicate detection pipeline: Stage 1 groups files by exact byte length, Stage 2 reads initial 4KB header prefixes to eliminate mismatches with minimal disk I/O, and Stage 3 computes full SHA-256 cryptographic hashes only when needed. Windows system directories and executable files are strictly immune from deletion.
The built-in Treemap Visualizer uses the squarified treemap layout algorithm (Bruls, Huizing, van Wijk) to display nested rectangles proportional to file and folder sizes. It operates 100% locally with zero external libraries and lets you instantly locate disk space hogs.
Yes. Deltempo includes dedicated VSS shadow copy management to enumerate existing system restore points, create instant checkpoints before major operations, and safely prune obsolete snapshots past user-configured retention thresholds.
Yes. Deltempo integrates directly with the native Windows Task Scheduler for automated daily, weekly, or idle cleaning. It also provides an optional 1-click Windows Explorer context menu entry to clean or inspect folders directly from right-click.
Deltempo combines the best aspects of all three while remaining 100% open source under MIT. Unlike CCleaner, it has zero telemetry and no paid upsells. Unlike BleachBit, it features a modern Fluent UI, native NT kernel memory optimization, and an app uninstaller. Unlike BCU, it includes an integrated 26+ scope disk cleaner, large file hunter, system repair tools, and a high-DPI tray monitor.
Yes. Deltempo is free and open source under the permissive MIT license. There are no paid tiers, no ads, no subscriptions, and no premium upsells.
Yes. Deltempo ships a language selector covering English, Arabic, Spanish, French, and German. Coverage is partial and still in progress: today it translates the main Cleaner workspace (header, target list, scan results and log), and selecting Arabic activates native Right-to-Left window flow with numeric values and paths kept Left-to-Right so statistics never invert. The modal dialogs and the remaining workspaces are still English-only.
No. Deltempo's protection policies are designed to strictly exclude personal files, documents, code repositories, browser login databases, and messaging app credentials from cleanup.
Deltempo natively supports 64-bit Windows 10 and Windows 11. It runs on modern .NET as a self-contained executable with no external runtimes required.
It calls native Windows NT APIs (NtSetSystemInformation with memory list class 80 and EmptyWorkingSet) to flush unreferenced standby lists and trim private working sets. It does not terminate running processes or kill active windows.
Open PowerShell and run: irm https://beso1227.github.io/Deltempo/win | Invoke-Expression. The script downloads the latest release, verifies its SHA-256 checksum, caches it locally, and launches it. Re-running the same command always pulls the newest published version, so update is identical to install. For the headless CLI binary, run irm https://beso1227.github.io/Deltempo/win-cli | Invoke-Expression instead. If the checksum manifest cannot be read or does not match, the install aborts and nothing is executed.
No. Deltempo is a portable single-file executable. When run, it registers a user-level App Path so you can invoke deltempo from terminal sessions without modifying Windows system directories.
Yes. Both the main executable and the dedicated deltempo_cli.exe support synchronous terminal execution with subcommands like deltempo clean temp, deltempo status --json, and deltempo update.

Get Deltempo Today

Open source, portable, and free forever. No installation required.

Download Deltempo.exe (GUI) Download deltempo_cli.exe (CLI)

Platform: Windows 10 / 11 (64-bit) • Type: Portable Single-File Binary • Latest Release: GitHub Releases

Or launch straight from PowerShell: irm https://beso1227.github.io/Deltempo/win | Invoke-Expression

View Checksums & Verification Guide →