Autoruns 64 Vs Autoruns 64a [better] Jun 2026

When you download the Microsoft Sysinternals Autoruns package, you are presented with multiple executables to ensure the tool can run natively across all modern Windows environments:

:

That's what the Wow6432Node is for. Both 64-bit binaries (x64 and ARM64) see 32-bit startup entries via the Registry Redirector. You don't need a special build.

Here’s a concise explanation of the difference between and Autoruns 64a from Microsoft Sysinternals.

There is no difference in the user interface, features, capabilities, or menus between Autoruns64 and Autoruns64a. They are identical twins under the hood, dressed for different hardware environments. By selecting the binary that matches your CPU architecture, you ensure the fastest scan speeds, absolute accuracy in registry parsing, and a seamless Windows troubleshooting experience. Share public link autoruns 64 vs autoruns 64a

Show you (yellow vs. white)

When you download the Microsoft Sysinternals Autoruns suite, the ZIP file contains several different executables. If you're trying to figure out whether to click autoruns64.exe or autoruns64a.exe ,

Feature comparison (major areas)

The need for a separate ARM64 version has grown significantly in recent years. Microsoft's Windows on ARM initiative powers a new generation of lightweight, power-efficient devices, including the Microsoft Surface Pro (X models) and various laptops from other manufacturers using the Snapdragon X Elite series. To run without performance penalties or compatibility layers, applications often need a dedicated ARM64 build. This naming convention ( 64a ) is used across many Sysinternals tools, including Autologon , AccessChk , and Process Monitor . Here’s a concise explanation of the difference between

architecture, commonly found in ultra-portable tablets or newer Windows on ARM laptops. Functionality:

The letter in autoruns64a.exe is the key. It stands for ARM64 .

If you are currently troubleshooting a system issue, let me know:

| 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 | By selecting the binary that matches your CPU

Locate the field under the Device Specifications header. Look for your designator: If it reads "x64-based processor" , use autoruns64.exe . If it reads "ARM-based processor" , use autoruns64a.exe .

Microsoft created when Windows started running on ARM processors.

The naming convention stems from Microsoft’s historical need to support multiple 64-bit platforms. In the Sysinternals suite, the "a" suffix explicitly denotes the "AMD64" processor architecture. Since AMD64 became the universal standard, the non-"a" version (Itanium) is now a ghost of computing history. Many users mistakenly believe the "a" stands for "administrator" or "advanced," but it is strictly an architectural marker.