Running an x64 tool on an ARM machine requires emulation, which can be slower. autoruns64a.exe runs natively on ARM, offering better speed and accuracy in detecting ARM-specific startup items 1.2.3. Summary Table: Autoruns 64 vs. Autoruns 64a Autoruns64.exe Autoruns64a.exe Architecture x64 (Intel/AMD) ARM64 (Qualcomm, etc.) Primary Use Conventional PCs/Laptops Modern Windows on ARM Devices Performance Native on x64, Emulated on ARM Native on ARM, Won't run on x64 Frequency Used 95% of the time Niche (ARM only) Which One Should You Run? For 99% of computers: Run autoruns64.exe .
Which Autoruns executable for AMD Radeon 64-bit? - Microsoft Learn
At first glance, they appear redundant. Both are 64-bit executables. Both bear the same icon. Both perform the same core function. But beneath the surface lies a critical distinction related to Windows on Windows (WoW64), file system redirection, and processor architectures.
Sysinternals provides different versions to ensure the tool runs natively on various system architectures for maximum performance and accuracy:
Launch this file if your machine runs on an Intel or AMD processor. Running this version ensures the software maps memory tables directly without relying on an emulation engine. What is Autoruns64.exe? autoruns 64 vs autoruns 64a
If you use the wrong one, the software will likely prompt you or fail to open. If you are unsure of your CPU type, right-click the Start menu, select "System," and check "System type." Other Files in the Pack
Build a cross-architecture triage kit:
: This is specifically for 64-bit ARM processors (like those found in newer Surface Pro models or specialized ARM-based laptops). Comparison at a Glance Executable Target Architecture Typical Devices autoruns.exe 32-bit (x86) Older legacy systems autoruns64.exe 64-bit (x64) Most modern Intel/AMD PCs autoruns64a.exe 64-bit (ARM64) ARM-based tablets and laptops autorunsc.exe Command Line Automation and scripting (32-bit) autorunsc64.exe Command Line Automation and scripting (64-bit) Why the "a"?
With the rise of ARM64 devices running Windows 11, using the correct binary ensures you are seeing all entry points, including: Emulated x64 processes Emulated x86 processes Running an x64 tool on an ARM machine
Tools like Autoruns need to look deep into system directories, driver stores, and registry keys. Running an emulated tool can cause the operating system to redirect file and registry queries to compatibility layers. Running autoruns64a.exe on an ARM device ensures you are querying the real, un-virtualized startup environment. What Happens If You Choose the Wrong Version? Running autoruns64a.exe on an Intel/AMD PC
Before comparing, it is essential to understand what both tools do. Autoruns is a comprehensive utility designed to show you what programs are configured to run during system bootup or login, including: Startup folders Registry keys Browser Helper Objects (BHOs) Scheduled tasks 1. Autoruns64.exe: The Standard 64-bit Tool
Autoruns is not a casual software app; it queries low-level Windows APIs, kernel-level drivers, and deep registry keys. To read these Autostart Extensibility Points (ASEPs) accurately without missing buried entries, the utility needs to match the target operating system's native architecture. What About the Other Files in the ZIP?
If you want to dive deeper into optimizing your boot configuration, let me know. I can help you understand or show you how to use Autoruns to hunt down persistent malware hidden in the registry . Share public link Autoruns 64a Autoruns64
If you run autoruns64.exe (x64) on an ARM64 device, it may fail to enumerate specific registry keys or file locations unique to the ARM architecture, leading to an incomplete picture of your startup programs. Conversely, autoruns64a is tailored to see the entire ARM environment. Other Files in the Autoruns Folder
Are you executing this manually via the or deploying it remotely via the Command Line ( autorunsc ) ?
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If you are unsure whether your computer runs an Intel/AMD chip or an ARM chip, you can quickly verify your architecture directly within Windows: Open your menu (shortcut: Win + I ). Navigate to System , then click on About . Locate the System type field under Device Specifications.
Run autoruns64.exe .