Process Hacker — A Process Management Tool 10x More Powerful Than Task Manager, Now Open Source
In one sentence: The most powerful free process viewer and manager on Windows, far surpassing the built-in Task Manager. View complete thread/handle/network connection/GPU usage/DLL modules for each process. Supports force terminate, suspend, memory editing, and other advanced operations. Now renamed to System Informer.
Do You Also Find Windows Task Manager “Not Enough”?
Scenario 1: Your CPU or memory is maxed out by some process. You open Task Manager — it only shows “System” or “svchost.exe” using 90% CPU. You can’t tell which specific service is causing it because Task Manager combines all svchost processes together. You can’t pinpoint the problem.
Scenario 2: You suspect a program has malicious behavior (secretly opening network connections, loading suspicious modules, injecting into other processes). You want to see each process’s “network connection list” and “loaded DLL list” — Task Manager doesn’t have these features.
Scenario 3: A program is frozen. You use Task Manager’s “End Task” — it doesn’t work. You try “End Process Tree” — still no luck. The process has self-protection mechanisms. You need a tool that can “forcefully terminate” it.
Process Hacker is designed for these “Task Manager isn’t enough” scenarios — it reveals all the details Task Manager hides and gives you more control.
What Is Process Hacker?
Process Hacker is an open source, free process management tool (now renamed to System Informer), developed and maintained by a community of enthusiasts. It’s essentially “Task Manager’s advanced version” — showing all the underlying Windows process information.
Its core features:
- Detailed process information: 10x more information than Task Manager
- Process management: Force terminate, suspend, priority settings, etc.
- System monitoring: Real-time CPU/memory/disk/network/GPU usage
- Diagnostic analysis: View handles, DLLs, network connections, thread stacks
In one sentence: When you feel “Task Manager can’t show me what’s causing the trouble,” open Process Hacker.
Core Features
1. Extremely Detailed Process Information — Far Beyond Task Manager
Process Hacker displays dozens of process information columns by default, far exceeding Task Manager’s basic metrics:
| Info Column | Description | Task Manager Has? |
|---|---|---|
| CPU Usage (per core) | Per logical CPU | ❌ Shows total only |
| GPU Usage | NVIDIA/AMD 3D/decode/encode | ⚠️ Win11 basic only |
| Disk I/O | Read/write speed and total bytes | ⚠️ Win10+ only |
| Network Connections | Per-process connections | ❌ No |
| Handle Count | System handles opened | ❌ No |
| GDI Objects | Graphics device interface count | ❌ No |
| Command Line | Full command line used to start | ❌ No |
| User Name | Account running the process | ✅ Yes |
| Process Path | Full exe file path | ⚠️ Need right-click |
| Process ID (PID) | Process identifier | ⚠️ Need to enable |
| Thread Count | Running threads | ✅ Yes |
Practical use: When Task Manager shows “svchost.exe eating 50% CPU,” Process Hacker can tell you exactly which specific service it is.
2. Force Terminate — When Normal Methods Fail, This Works
Process Hacker’s process termination is much stronger than Task Manager’s:
| Operation | Description | Task Manager | Process Hacker |
|---|---|---|---|
| End Process | Standard termination | ✅ | ✅ |
| End Process Tree | Kill process and all children | ✅ | ✅ |
| Force Terminate | Bypass exit handling, direct kill | ❌ | ✅ Exclusive |
| Suspend Process | Temporarily freeze process | ❌ | ✅ |
| Resume Process | Unfreeze suspended process | ❌ | ✅ |
| Detach Debugger | Force detach if debugger attached | ❌ | ✅ |
“Force Terminate” is the most commonly used feature — when a process is frozen and “End Task” doesn’t work, Process Hacker’s force terminate can usually handle it.
3. View a Process’s “Insides” — Handles, DLLs, Threads, Network
Right-click any process → “Properties” → See multiple tabs:
| Tab | Content Displayed |
|---|---|
| Threads | All threads in the process and their stack call chains |
| Modules | All DLLs loaded by the process — check for suspicious DLL injection |
| Handles | All system objects opened by the process (files, registry, events, etc.) |
| Network | All TCP/UDP connections — which IPs and ports it’s connected to |
| Disk | Read/write operations in progress |
| GPU | GPU usage |
| Memory | Virtual memory, working set, private bytes, etc. |
| Services | Windows services hosted by this process (especially useful for svchost.exe) |
Typical malware investigation workflow:
- Find a process with unusual network connections
- Check the “Network” tab — see which IPs it’s connecting to
- Check the “Modules” tab — see if any suspicious DLLs are loaded
- Check “Command Line” — confirm it’s a legitimate program path
4. System Monitoring — Real-Time Charts for All Resources
Process Hacker comes with a system monitoring panel (similar to Task Manager’s “Performance” tab, but more informative):
System Overview:
CPU: Average 15% (6 cores / 12 threads)
Memory: 8.5 GB / 16 GB (53%)
Disk C: Read 50 MB/s / Write 30 MB/s
Network: Download 2 Mbps / Upload 0.5 Mbps
GPU: 3D Load 20%These monitoring metrics also display in the system tray icon — you can set it to show CPU/memory/temperature in the tray (Task Manager doesn’t have this feature).
5. Service Management — Start/Stop Windows Services
Process Hacker includes built-in service management (similar to services.msc):
- View all Windows service statuses
- Start/Stop/Restart services
- View service → process mapping (see “how much resource this service is using”)
- View service dependencies
Professional Media and User Reviews
| Source | Review |
|---|---|
| TechSpot | ”Process Hacker is an essential tool for power users — it reveals everything about running processes that Task Manager hides” |
| Ghacks | ”If you’ve ever been frustrated by Task Manager’s limitations, Process Hacker is the solution — it’s more powerful in every way” |
| How-To Geek | ”Process Hacker combines the best features of Task Manager and Process Explorer into one powerful, free tool” |
What Real Users Say
“When Task Manager can’t even open (disabled by malware), Process Hacker still works fine. Once I suspected my computer was infected — opened Process Hacker and saw an unknown process frantically establishing network connections. Right-click → Properties → Network tab → Saw it connecting to a foreign IP. Force terminated and deleted the file immediately.” — Security Ops Engineer, Zhihu
“svchost.exe eating 100% CPU. Task Manager only told me ‘Service Host: Local System’ (dozens of services pooled together). Switched to Process Hacker and found it was a Windows Update service retrying in the background. Stopped the service and CPU dropped immediately. Task Manager can’t pinpoint it to this level.” — System Administrator, V2EX
“The ‘Suspend Process’ feature is incredibly useful. When gaming, a background process steals CPU — find it, right-click, suspend — game is smooth again. Right-click, resume when done. Better than ‘End Process’ because you don’t need to restart the program.” — Gamer, SegmentFault
Competitor Comparison
| Dimension | Process Hacker | System Task Manager | Process Explorer | Process Lasso |
|---|---|---|---|---|
| Price | Fully Free | Built-in Free | Fully Free | Free/Pro $29.95 |
| Status | Renamed to System Informer | System built-in | Microsoft (Active) | Active |
| Process Detail Level | ⭐⭐⭐⭐⭐ Most comprehensive | ⭐⭐ Limited | ⭐⭐⭐⭐⭐ Comprehensive | ⭐⭐⭐⭐ Good |
| Handle/DLL View | ✅ Yes | ❌ No | ✅ Yes | ❌ No |
| Network Connection View | ✅ Per process | ❌ No | ✅ Per process | ❌ No |
| GPU Monitoring | ✅ Supported | ⚠️ Win11+ | ❌ No | ❌ No |
| Force Terminate | ✅ Exclusive | ❌ No | ❌ No | ✅ Yes |
| Suspend/Resume Process | ✅ Exclusive | ❌ No | ❌ No | ✅ Yes |
| System Tray Monitoring | ✅ Customizable | ❌ No | ✅ Yes | ✅ Yes |
| Memory Editing/Debugging | ✅ Yes | ❌ No | ❌ No | ❌ No |
| Open Source | ✅ Yes (GPL) | ❌ No | ❌ No | ❌ No |
| Portable Version | ✅ Yes (Recommended) | N/A | ✅ Yes | ❌ No |
Recommendations:
- Process analysis + forceful management → Process Hacker (System Informer) (most comprehensive, open source)
- Microsoft official + lightweight viewing → Process Explorer (Sysinternals suite)
- CPU auto-optimization + priority management → Process Lasso (for users needing automated CPU allocation)
- Basic info only → System Task Manager (Ctrl+Shift+Esc, adequate for daily use)
Download & Installation Guide
Official Download
Process Hacker has been renamed to System Informer, and the official website has moved:
| Channel | Download Link | Notes |
|---|---|---|
| GitHub (Recommended) | github.com/winsiderss/systeminformer | Formerly Process Hacker, GPL open source |
| SourceForge | sourceforge.net/projects/processhacker | Legacy Process Hacker download |
Safety reminder: Process Hacker is open source free software (GPL license). Portable version recommended — download ZIP, extract and run, no registry writes. For system-level tools, portable versions are safer — use and delete with no leftovers.
Name change note: Process Hacker was renamed to System Informer after 2020. You can find the latest version at the
winsiderss/systeminformerrepository on GitHub. They’re the same software under different names.
Usage Tips
- Run as administrator: Many advanced features (force terminate, view other users’ processes) require admin rights
- Replace Task Manager: Check “Replace Task Manager” in settings — then Ctrl+Shift+Esc opens Process Hacker directly
- Tray icon settings: View → Options → System Tray → Select what to display (recommend CPU + memory)
FAQ
Q: Which is better, Process Hacker or Process Explorer? A: Both are top-tier tools. Process Hacker (System Informer) features: open source, GPU monitoring, force terminate, suspend, memory editing. Process Explorer features: Microsoft official (Sysinternals), better system integration, stronger debug symbol support. Choice: open source + feature completeness → Process Hacker; Microsoft official + stability → Process Explorer.
Q: Can Process Hacker replace Task Manager? A: Absolutely. Process Hacker covers all of Task Manager’s features and adds 10x more information. Many advanced users replace Task Manager with Process Hacker entirely.
Q: What’s the update with the name change to System Informer?
A: The development team renamed the project to System Informer in 2020 (because functionality had expanded beyond “process management” into “system information”). The repository moved from processhacker/processhacker to winsiderss/systeminformer. Downloading System Informer gives you the latest Process Hacker.
Process Hacker (System Informer) is the “hidden level” of Task Manager — when you press Ctrl+Shift+Esc and find the information insufficient, open it to see all the secrets Task Manager hides: every process’s threads, handles, network connections, DLL loads… It’s an unguarded “system all-seeing eye.”