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Our ultimate directory of Windows PC executables.

What’s Compil32.exe (Inno Setup Compiler)? Is it safe or a virus?

Compil32.exe, developed by Pyrsys B.V., is the main executable for the Inno Setup Compiler, a free and open-source tool used to create Windows application installers. It compiles script files written in the Inno Setup scripting language into standalone executable installer packages. These scripts control the installation process, including file copying, registry updates, and custom behaviors. Compil32.exe provides a graphical user interface for editing, debugging, and compiling setup scripts, making it easier for developers to bundle applications with a professional, customizable installer. It’s widely used for efficient, lightweight, and reliable software distribution on Windows platforms.

Below are 4 simple steps you can take to see if the Compil32.exe process is safe or malware.

  1. Scan the executable with Microsoft's built-in tech
  2. Find Compil32.exe's publisher
  3. Search the executable's hash with VirusTotal
  4. Monitor the executable's behavior

Researched by Carl @ SpyShelter Labs

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A Trojan is a harmful software that pretends to be a legitimate program or file to deceive users into downloading it. It can steal personal information, damage files, or give hackers control over the infected device.

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More about Compil32.exe on WINDOWS

Who makes Compil32.exe (Inno Setup Compiler)?

We’ve found Pyrsys B.V. should be the publisher of Compil32.exe.

How do we know? Our SpyShelter cybersecurity labs focuses on monitoring different types of Windows PC executables and their behaviors for our popular SpyShelter Antispyware software. Learn more about us, and how our cybersecurity team studies Windows PC executables/processes.

What does it mean if someone is the publisher of a PC .exe (executable or process)?

The publisher of an executable is the entity responsible for its distribution and authenticity. Most processes/executables on your PC should be signed. The signature on the executable should have been verified through a third party whose job it is to make sure the entity is who it says it is. Find an unsigned executable? You should consider scanning any completely unsigned .exe on your PC.

Last updated: March 13, 2025

Curious about other processes on your PC?
Try SpyShelter or search below.

Or browse the process directory by name:

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Why should you trust us?

Our team at SpyShelter has been studying Windows PC executables for over 15 years, to help fight against spyware, malware, and other threats. SpyShelter has been featured in publications like The Register, PC Magazine, and many others. Now we’re working to share free, actionable, and easy to understand information about Windows executables (processes) with the world, to help as many people as possible keep their devices safe. Learn more about us on our "About SpyShelter” page.

Have any questions? Please join our free public SpyShelter PC Security Forum and talk cybersecurity with our USA-based team. We love talking about PC Security and we’d like to get to know you.

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