System Informer 4.0 Portable Download for Windows
System Informer is a free and open source process viewer built for deep system inspection on Windows. Originally created in 2008 by Wen Jia Liu as a community-driven alternative to the built-in Task Manager and Sysinternals Process Explorer, it has matured into a full-featured toolkit for debugging, malware analysis, and real-time system monitoring. The project is now officially maintained by Winsider Seminars & Solutions, Inc. and carries the legacy of its predecessor, Process Hacker.
Whether you are tracking down a stubborn process, investigating a suspicious driver, or simply want more visibility than Task Manager offers, System Informer gives you granular control over threads, handles, services, and kernel objects. The 4.0 release marks a significant milestone with a rebuilt kernel driver, a modernized installer, and expanded online analysis integrations, making it one of the most capable open source system utilities available today.
In This Post
Power User Guide
Set Up Hybrid Analysis for Automated Malware Verdicts
- Open System Informer and navigate to OnlineChecks settings.
- Enter your Hybrid Analysis API key under the per-service configuration.
- Add path exclusions for trusted directories to reduce noise.
- Enable the Hybrid Analysis column in the process list view.
- Review verdicts in real time and submit unknown files for cloud analysis as needed.
How This Would Help: Configuring Hybrid Analysis turns System Informer into an active threat-detection tool, surfacing known malware verdicts alongside process data without relying solely on local antivirus signatures.
Use Process Monitor to Diagnose Application Startup Failures
- Open Tools > Process Monitor from the main menu.
- Set a filter on the process name matching the application you are troubleshooting.
- Capture a short log of registry and file access events during the failure.
- Review the log for ACCESS DENIED entries or missing file paths.
- Adjust permissions or file locations based on the findings.
How This Would Help: Process Monitor’s driver-backed event log provides ground-truth visibility into what the operating system sees during startup, making it far more reliable than guessing based on error messages.
Enable the Experimental Low-Latency Mode on Windows 11
- Confirm you are running Windows 11 with the latest updates installed.
- Open System Informer settings and locate the advanced or experimental section.
- Enable the low-latency mode option to activate high-resolution provider timers.
- Restart System Informer to apply the change.
- Monitor CPU usage graphs for improved sampling granularity.
How This Would Help: This mode provides higher-resolution timer data for system monitoring graphs, which is valuable when diagnosing micro-stutters, brief CPU spikes, or latency-sensitive workloads that standard polling intervals may miss.
Download System Informer
File size: 28.9 MB
OS support: Windows
Windows
Highlights in New Version
- Process Monitor added to the Tools menu with a driver-backed live log covering process, thread, image, registry, file, handle, and silo events with filtering and access-mask decoding.
- Hybrid Analysis integration through OnlineChecks automatically checks running processes and loaded images against cloud verdicts, with optional submission and local result caching.
- Ring-buffer informer transport in the kernel driver replaces per-message port round-trips with a large shared-memory ring, featuring rate limiting and per-client statistics.
- New modern installer with dark mode, DPI scaling, uninstaller, shortcut page, and atomic staged extraction with rollback on failed updates.
- Updated updater with toast-notification flow, progress display, and support for BITS, Delivery Optimization, and Microsoft Store download back-ends.
- Experimental low-latency mode for Windows 11 using high-resolution provider timers.
- Per-monitor DPI and dark theme improvements across the app, plugins, and property sheets, including Windows 11 border rendering and reduced resize flicker.
Notable Features
- Process and Thread Inspection: View detailed information about all running processes and threads, including token details, parent-child relationships, CPU and memory usage, and thread start addresses. Suspend, resume, or terminate individual processes and threads directly from the interface.
- Handle and DLL Analysis: Inspect open handles and loaded modules for any process, identify which resources are being accessed and by whom. Filter by handle type, name, or access mask to track down resource leaks or suspicious activity quickly.
- Service and Driver Management: Full control over Windows services and kernel drivers. Start, stop, enable, disable, or change the start type of any service, and inspect driver load order and signatures to detect unauthorized or unsigned kernel components.
- Built-in Process Monitor: A driver-backed live log of process, thread, image, registry, file, handle, and silo events with powerful filtering and access-mask decoding. Configurable look-back lets you review recent activity without writing to disk.
- Hybrid Analysis Integration: Automatically check running processes and loaded images against Hybrid Analysis cloud sandbox results, with verdicts displayed directly in the process and module lists. Unknown files can be submitted for analysis, with local caching to avoid repeated lookups.
- Modern Installer with Dark Mode: The 4.0 release introduces a redesigned wizard with dark mode support, DPI scaling awareness, an uninstaller, shortcut configuration, and atomic staged extraction with rollback protection to prevent half-written directories on failed updates.
- Per-Monitor DPI and Dark Theme: Full per-monitor DPI awareness and dark theme rendering across the application, plugins, and property sheets, including properly drawn Windows 11 borders and significantly reduced resize flicker.
- System Monitoring and Graphs: Real-time graphs for CPU, memory, I/O, and network usage at both the system and per-process level, giving you a clear picture of resource consumption and bottlenecks.
Technical Specifications
| Software Name | System Informer |
|---|---|
| Version | 4.0 |
| License | Open Source |
| File Size | 28.9 MB |
| OS Support | Windows |
| Language | English |
| Developer | Winsider Seminars & Solutions, Inc. |
| Homepage | https://systeminformer.io/ |
| Changelogurl | https://github.com/winsiderss/systeminformer/releases |
| Last Updated | September 3, 2026 |
Installation Steps
Installation Steps
- Click the download button above to get the installer for your operating system
- Locate the downloaded file and double-click to run the installer
- Follow the on-screen installation wizard to complete setup
Compatibility: Compatible with Windows 7 and later versions, both 32-bit and 64-bit editions. A portable archive is also available for users who prefer not to install.
Questions & Answers
Is System Informer free to use?
Yes. System Informer is free and open source software. The full source code is available on the project’s GitHub repository, and the application can be downloaded and used without any cost or feature restrictions.
What is the difference between System Informer and Process Hacker?
System Informer is the official successor to Process Hacker, maintained by the same development team at Winsider Seminars & Solutions, Inc. It continues the same mission of providing a powerful open source alternative to Task Manager and Process Explorer while introducing major architectural improvements such as a rebuilt kernel driver.
Is System Informer safe to install?
System Informer is a well-established open source project with a long development history. Because it includes a kernel driver for deep system inspection, it should always be downloaded from the official site or the official GitHub repository to ensure you receive an untampered build.
