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winsiderss/systeminformer

Free

A free, powerful, multi-purpose tool that helps you monitor system resources, debug software and detect malware. Brought to you by Winsider Seminars & Solutions, Inc. @ http://www.windows-internals.com

FreeFree tier
Type
Open Source
Company
Winsider Seminars & Solutions, Inc.
Visit Website GitHub (38 stars)

About winsiderss/systeminformer

System Informer is a free, open-source system monitoring and debugging tool for Windows 10 and above. It provides a detailed overview of system activity with highlighting, graphs, and statistics to quickly identify resource hogs and runaway processes. Users can discover which processes are locking files, view active network connections and close them, monitor real-time disk access, and inspect detailed stack traces with kernel-mode, WOW64, and .NET support. It also allows creating, editing, and controlling services beyond what services.msc offers. The tool is portable, requires no installation, and is licensed under MIT.

Key Features

Detailed overview of system activity with highlighting
Graphs and statistics to identify resource hogs and runaway processes
File handle search to discover which processes are using a file
Real-time network connection monitoring with ability to close connections
Real-time disk access information
Detailed stack traces with kernel-mode, WOW64, and .NET support
Service management beyond services.msc: create, edit, and control services
Small, portable, no installation required
100% free software under MIT license

Pros & Cons

Pros
  • Completely free and open-source (MIT license)
  • Portable application with no installation needed
  • Comprehensive real-time system monitoring with graphical statistics
  • Advanced debugging features including kernel-mode and .NET stack traces
  • Ability to manage services beyond what built-in tools offer
  • Supports Windows 10 and later, both 32-bit and 64-bit
Cons
  • Windows-only tool, no cross-platform support
  • Requires Windows 10 or newer, not compatible with older versions
  • Advanced features may have a learning curve for non-technical users

Best For

Monitoring system resource usage and identifying performance bottlenecksDetecting and analyzing malware by inspecting processes and network connectionsDebugging software with detailed stack trace support including kernel-mode and .NETInvestigating file locking issues to see which process is using a fileManaging Windows services (create, edit, control) beyond services.mscAnalyzing disk access patterns in real-time

FAQ

Is System Informer free?
Yes, System Informer is 100% free software released under the MIT license.
What Windows versions are supported?
System Informer supports Windows 10 or higher, both 32-bit and 64-bit editions.
Does System Informer require installation?
No, it is portable and requires no installation. You can run it directly from a USB drive if desired.
Can I see which process is using a file?
Yes, System Informer can discover which processes have a file open and are using it.