Autoruns 64 Vs Autoruns 64a __link__

For driver forensics, always use the native build on ARM64. Emulation won’t miss drivers, but performance is worse.

Because these tools run with high privileges to modify system startup behavior, it is critical to use the version that matches your hardware to avoid emulation overhead or potential errors in driver reporting.

: Avoids the "Not a valid Win32 application" execution error when auditing standard PCs. Which autoruns executable to use? - Microsoft Q&A

Pros & Cons (concise)

This article is current as of Autoruns version 14.11. Always consult the official Sysinternals documentation for updates as ARM64 Windows continues to evolve. autoruns 64 vs autoruns 64a

For a standard Windows 10 or 11 installation on an Intel or AMD processor, you should use . If you happen to run the basic autoruns.exe (the 32-bit version) on a 64-bit system, it is designed to detect the architecture and automatically launch the 64-bit version for you.

To understand why Microsoft provides two distinct 64-bit versions of the exact same diagnostic tool, it helps to examine the underlying hardware architectures they target. Executable Name Intended CPU Architecture Common Processor Examples x86-64 / x64 / AMD64 Intel Core, Intel Core Ultra, AMD Ryzen autoruns64a.exe ARM64 / AArch64

If it says "64-bit operating system, ARM-based processor," .

is the correct choice. If you aren't sure, running the generic autoruns.exe For driver forensics, always use the native build on ARM64

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 .

This is the version most users need. It is built specifically for the architecture used by modern Intel and AMD processors.

When you download the Microsoft Sysinternals Autoruns utility suite, extracting the ZIP archive reveals several executable versions. Choosing the wrong file will either result in degraded performance through emulation or a system error stating the application is not valid for your platform.

If you are unsure, simply run . On most modern 64-bit systems, the tool is designed to detect your architecture and will often automatically relaunch the correct 64-bit version for you. : Avoids the "Not a valid Win32 application"

Choosing the wrong executable can result in poor performance, unnecessary emulation overhead, or an explicit system error preventing the app from launching entirely. This comprehensive article explains the underlying differences, why Microsoft distributes both versions, and how to verify which one is right for your system. Architectural Breakdown

: Native 64-bit application for energy-efficient ARM processors (ARM64 architecture).

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