Autoruns 64 Vs Autoruns 64a

We tested both versions on three systems:

Key Takeaway: No functional difference in detection count on standard machines, but massive performance gap on ARM64.

| Your system | Recommended build | Why | |-------------|------------------|------| | Intel/AMD (x64) | autoruns64.exe | Native, no emulation layer needed | | ARM64 (Snapdragon, etc.) | autoruns64a.exe | Faster, lower RAM, avoids Prism translation | | You share a USB toolkit | Both | Keep autoruns64.exe (works everywhere except pure ARM64 without emulation – rare) |

Before diving into the differences between Autoruns 64 and Autoruns 64a, let's briefly overview what Autoruns does. Autoruns is an advanced utility that shows a comprehensive list of all applications that are configured to run at system boot or login. It scans the registry and file system for entries that could potentially be executed automatically, presenting them in an organized manner. This allows users to easily enable, disable, or delete entries to manage startup programs.

To understand why you cannot simply use one binary everywhere, let us examine the internal behavior. autoruns 64 vs autoruns 64a

| Feature | Autoruns64 | Autoruns64a | |--------|-----------|-------------| | Architecture | x86-64 (AMD64/Intel64) | ARM64 | | OS requirement | Standard 64-bit Windows | Windows on ARM (e.g., ARM-based laptops) | | Can it run on x64? | ✅ Yes, natively | ❌ No (only under emulation, slow) | | Can it run on ARM64? | ❌ No (unless emulated) | ✅ Yes, natively |

Tool: Microsoft Sysinternals Autoruns v14.09
Builds compared: autoruns64.exe (x64) vs. autoruns64a.exe (ARM64)
Reviewed on: Windows 11 Pro (x64) & Windows 11 on Snapdragon (ARM64)

In conclusion, understanding and effectively utilizing tools like Autoruns 64 and Autoruns 64a can significantly enhance system management and troubleshooting capabilities. By choosing the right tool for the task and being aware of their capabilities and limitations, users can better manage their systems, improve performance, and enhance security.

The primary difference between autoruns64.exe autoruns64a.exe processor architecture

they are designed to run on. Both are 64-bit versions of the Sysinternals Autoruns utility, but they target different hardware platforms. Microsoft Learn Core Technical Differences autoruns64.exe (x64) : This version is built for x86-64 (AMD64/Intel 64) We tested both versions on three systems: |

processors. It is the standard executable for the vast majority of modern 64-bit Windows laptops and desktops using Intel Core or AMD Ryzen chips. autoruns64a.exe (ARM64) : The "a" suffix stands for . This version is compiled specifically for

processors, such as the Qualcomm Snapdragon chips found in "Always Connected" PCs (e.g., Surface Pro 9 with 5G or Samsung Galaxy Book). Microsoft Learn Functionality Comparison

Aside from their underlying architecture, the two files offer identical features for managing startup locations: autoruns64.exe autoruns64a.exe Full Graphical User Interface (GUI) Full Graphical User Interface (GUI) 64-bit Windows (x64) 64-bit Windows (ARM64) Scans registry, services, and tasks Scans registry, services, and tasks Supports VirusTotal hash checks Supports VirusTotal hash checks Which One Should You Use?

For a standard Windows installation on an Intel or AMD processor, you should use autoruns64.exe

. If you try to run the wrong version, Windows will typically display an error stating that the file is "not a valid Win32 application". Microsoft Learn | Your system | Recommended build | Why

If you prefer using the command line instead of the visual interface, look for the counterparts autorunsc64.exe autorunsc64a.exe (ARM64), where the "c" indicates the command-line version. Microsoft Learn suspicious startup items? Which autoruns executable to use? - Microsoft Q&A

Paul Jackson 26. Feb 12, 2021, 3:23 AM. Hello, The Sysinternals Autoruns utility includes multiple executable files: autoruns.exe, Microsoft Learn Which autoruns executable to use? - Microsoft Q&A

Paul Jackson 26. Feb 12, 2021, 3:23 AM. Hello, The Sysinternals Autoruns utility includes multiple executable files: autoruns.exe, Microsoft Learn Sysinternals Utilities - Microsoft Learn

The primary difference between Autoruns 64 and Autoruns 64a lies in their handling of executable image path and command-line argument processing.