Free & Open Source · Built with .NET 8 · 🌍 Multilingual

Optimize Windows 11
in One Click

The best free Windows 11 optimizer. Boost PC performance, protect your privacy, and clean up disk space — safely and reversibly. No bloatware, no third-party tools, no risk.

Download K-win v1.0.0 Explore Features
30+ Optimizations
6 Categories
3 Languages
100% Reversible
✓ Open Source ✓ No Telemetry ✓ Works Offline
About

What is K-win?

K-win is a free, open-source Windows 11 optimizer built with .NET 8 and C#. Unlike other PC optimization tools, K-win focuses on doing 10 things perfectly rather than 100 things poorly.

🎯

Focused Optimization

30+ carefully selected optimizations across Performance, Privacy, Cleanup, Tweaks, Apps, and RAM management. Each tweak is tested and validated on Windows 11.

🔓

100% Open Source

Every line of code is visible on GitHub. No hidden processes, no data collection, no secrets. Build from source yourself if you prefer.

🛡️

Safety First Design

System Restore Points created automatically. Registry backed up before changes. Up to 5 operations can be undone instantly. Nothing is permanent.

Benefits

Why Use K-win?

1

Faster Boot & Better Performance

Optimize power plans, disable unnecessary visual effects, manage startup programs, and enable Game Mode for maximum Windows 11 performance.

2

Enhanced Privacy Protection

Reduce Windows telemetry, disable ad tracking, clear activity history, block 60,000+ ad domains system-wide, and disable Windows Recall AI.

3

Reclaim Disk Space

Clean temp files, browser caches (Edge, Chrome, Firefox), Microsoft Store cache, and run system repair tools like SFC and DISM.

4

Remove Bloatware Safely

Identify and remove pre-installed Windows 11 bloatware with one click. Remove for all users to prevent reinstallation.

Typical Results After K-win Optimization

Boot Time
Before: 45 sec
After: 28 sec
38% faster
Disk Space
Before: Full
After: 2-5 GB freed
Cleaner system
RAM Usage
Before: 4.2 GB idle
After: 2.8 GB idle
33% reduction
Privacy Score
Before: Limited
After: Enhanced
60K+ ads blocked
Features

Complete Windows 11 Optimization Suite

Six powerful modules covering every aspect of Windows 11 optimization. Each feature is safe, reversible, and thoroughly tested.

Performance Optimization

  • Power Plan Selector

    Switch to High or Ultimate Performance plans for maximum speed

  • Visual Effects Optimizer

    Disable animations, shadows, and transparency for faster UI

  • Startup Manager

    Identify and disable unnecessary startup programs

  • One-Click Performance Boost

    Apply all performance optimizations instantly

  • Game Mode & Fast Startup

    Toggle gaming optimizations with status detection

Privacy Protection

  • Telemetry & Ad ID Control

    Reduce Windows telemetry, disable advertising ID tracking

  • Activity History & Recall

    Clear timeline data and disable Windows Recall AI (24H2+)

  • DNS Changer

    Switch to Cloudflare, Google, Quad9, or OpenDNS for private browsing

  • System-Wide Ad Blocker

    Block 60,000+ ad & tracker domains via hosts file

Disk Cleanup Tools

  • Temp File Cleaner

    Remove temporary files with space preview before cleaning

  • Browser Cache Cleaner

    Clean Edge, Chrome, and Firefox caches in one click

  • System Repair Tools

    Run SFC and DISM directly from the app

  • Store & Recycle Bin

    Reset Microsoft Store cache and empty Recycle Bin

Windows Tweaks

  • Dark / Light Mode

    Toggle system-wide theme instantly

  • Classic Context Menu

    Restore full Windows 10 right-click menu

  • Widgets & Chat

    Disable widgets, Teams chat, and more

  • Shutdown Speed

    Optimize shutdown and menu response times

App Management

  • App Uninstaller

    Browse and uninstall Store & Desktop apps easily

  • One-Click Bloatware Remover

    Detect and remove all Windows bloatware automatically

  • Remove for All Users

    Remove provisioned apps system-wide

RAM Optimization

  • Live RAM Monitor

    Real-time memory usage with top processes

  • Clear Cached RAM

    Empty working sets to free memory instantly

  • SysMain Control

    Toggle SysMain (Superfetch) and memory compression

Safety First

Is K-win Safe? Absolutely.

Every change K-win makes is 100% reversible. Your system is always protected with multiple safety layers.

Automatic Restore Points

System Restore Point created before every modification via Windows WMI

Registry Backups

Every registry key exported to .reg file before any changes

Instant Undo

Up to 5 operations can be undone instantly from the UI

Preview Mode

See every change before it happens — nothing applies without confirmation

Full Activity Logging

Every operation logged as JSON with timestamps and values

Timeout Protection

30-second timeout on all processes — no stuck operations

What K-win Will Never Do

No third-party executables. No boot config changes. No disabling Windows Update, Defender, or Store. No unsigned scripts. Only safe, documented modifications.

Compatibility

Windows 11 Compatibility

K-win is built specifically for Windows 11 with full support for all major releases.

✓ Fully Supported

  • Windows 11 22H2
  • Windows 11 23H2
  • Windows 11 24H2
  • Windows 11 Home
  • Windows 11 Pro
  • Windows 11 Enterprise

✗ Not Supported

  • Windows 10 (any version)
  • Windows on ARM
  • Windows Server
  • 32-bit systems

System Requirements

  • x64 (64-bit) processor
  • Administrator privileges
  • ~150 MB disk space
  • No .NET install required (self-contained)

Download K-win Free

Free, open-source Windows 11 optimizer. No signup, no bloatware, just a single EXE file.

Version 1.0.0
Size ~68 MB
Platform Windows 11 x64
Runtime Self-contained
Download K-win.exe
Star on GitHub View All Releases

Requires Windows 11 22H2 or later. Run as Administrator (UAC prompt will appear).

Quick Start Guide

  1. Download K-win.exe
  2. Right-click → "Run as administrator"
  3. Select your language (English, French, Arabic)
  4. Choose optimizations in the preview dialog
  5. Apply and restart if prompted

File Verification

Build from source available on GitHub for security verification.

FAQ

Frequently Asked Questions

Everything you need to know about K-win Windows 11 optimizer.

Yes, K-win is completely safe. It creates a System Restore Point before every modification and backs up all registry keys before writing. Every change can be undone via the built-in Undo button or Windows System Restore. K-win only uses built-in Windows tools — no third-party executables are ever downloaded or run. The hosts-based ad blocker uses a well-known community list and can be fully reversed.

No. K-win never disables Windows Update services, Windows Defender, or any critical system service. Telemetry is reduced to Basic (level 1), not disabled entirely — level 0 can break updates, so K-win avoids it. 20+ critical Windows services are blocklisted from being disabled.

K-win modifies specific registry keys for visual effects, telemetry, advertising ID, context menu, and Windows Recall. It uses powercfg.exe for power plans, netsh.exe for DNS changes, and deletes only temporary files and browser caches. The ad blocker modifies the hosts file with clearly marked entries. A complete list is documented in the SAFETY.md file included with the source code.

Yes. K-win maintains an undo stack of up to 5 recent operations. Click the "↶ Undo" button in the footer to revert the last change. Additionally, every operation creates a System Restore Point, so you can also use Windows System Restore for full recovery.

Most Windows 11 optimizations require writing to HKEY_LOCAL_MACHINE registry keys, modifying DNS settings, editing the hosts file, stopping system services, and running system tools like SFC and DISM. These operations require Administrator privileges. K-win requests elevation through the standard Windows UAC prompt.

No. K-win is designed specifically for Windows 11 (build 22000 and later). Many of the registry paths and features are Windows 11-specific. Running on Windows 10 will show a compatibility error. A Windows 10 version is not currently planned.

K-win is built from source code using .NET 8 and Microsoft's official SDK. It does not use obfuscation or packing techniques that trigger false positives. If your antivirus flags it, you can verify the source code on our GitHub repository and build it yourself.

Yes, K-win v1.0 is completely free with all features unlocked. No trials, no ads, no signup required. The project is open-source and available on GitHub. We may offer a Pro version with additional features in the future, but the core optimizer will always be free.

K-win supports English, French (Français), and Arabic (العربية) with full RTL layout support. The language picker appears on first launch, and you can switch languages anytime from Settings. All 30+ features and UI elements are fully translated.

The DNS Changer uses the built-in Windows netsh command to switch your active network adapter's DNS to privacy-focused providers like Cloudflare (1.1.1.1), Google (8.8.8.8), Quad9 (9.9.9.9), or OpenDNS (208.67.222.222). You can also reset to automatic (DHCP) DNS. No third-party software is installed.

K-win downloads the Steven Black unified hosts file — a well-known, community-maintained blocklist containing 60,000+ ad and tracker domains. These entries are added to your Windows hosts file between clearly marked K-win comment blocks, making them easy to identify and fully reversible with one click.