Process Monitor

Logs every file, registry, process, thread and DLL operation on Windows in real time, which is how you find out why something failed.

FreeProprietaryWindows

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3 more ways to get Process Monitor

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Run by third parties, not by Microsoft Sysinternals. Prefer the official page above when it works.

Package managers

  • wingetwinget install --id Microsoft.Sysinternals.ProcessMonitor

About Process Monitor

When an installer fails with no useful error, or a program cannot find a configuration file it insists exists, Process Monitor is the tool that tells you why. It records every file system and registry operation as it happens, with the result code, so you can see the exact path that returned NAME NOT FOUND or ACCESS DENIED.

It combines the old Filemon and Regmon utilities and adds rich non-destructive filtering, which matters because it captures tens of thousands of events a minute. You filter down after capturing rather than deciding in advance. Each event carries a full thread stack, session and user details and a timestamp.

It is a Sysinternals tool, distributed as a ZIP, and there is a Procmon for Linux too.

Strengths

  • Shows the exact file or registry path that failed and the result code it returned
  • Non-destructive filtering, so you can narrow down after capturing rather than before
  • Full thread stack, session and user detail on every event
  • A Linux version exists alongside the Windows one

Limitations

  • Windows only for the main version
  • Generates enormous volumes of events; filtering is mandatory, not optional
  • Closed source
  • Interpreting the output needs some understanding of how Windows loads things

Details

Pricing
Free · Free to download and use, published by Microsoft as part of the Sysinternals suite. The source is not published.
License
Proprietary
Developer
Microsoft Sysinternals
Platforms
Windows
How it runs
Downloadable app
Account
Not required
Works offline
Yes
Best suited for
Diagnosing why a program or installer is failing when the error message says nothing
Categories
System monitoring
Last verified
Added
Provenance
Selected from the TechWalrus downloads catalog (System Monitor); facts checked against the developer's own pages, 2 sources on file.

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