Autoruns 64 Vs Autoruns 64a //top\\

Originally written by Mark Russinovich and Bryce Cogswell, Autoruns was a 32-bit application designed for Windows NT/2000/XP. As Windows transitioned to 64-bit computing (x64), Sysinternals faced a challenge: .

This article breaks down the differences between and autoruns64a , helping you select the appropriate tool for your machine. What is Autoruns?

If you try to launch autoruns64a.exe on a computer running an AMD Ryzen or Intel Core processor, the Windows operating system will reject the execution. You will instantly see a system alert stating that the file is . This happens because standard desktop processors do not understand the machine code compiled for ARM architecture.

While Windows on ARM can run standard x64 programs through built-in software emulation, running autoruns64.exe on an ARM device creates unnecessary performance overhead. Using autoruns64a.exe ensures the program interacts directly with the ARM processor natively, yielding faster scans and zero emulation glitches. 3. Deep System Scanning Accuracy autoruns 64 vs autoruns 64a

Both versions provide the exact same "comprehensive knowledge" of auto-starting locations, including registry keys, services, and shell extensions. They allow you to identify and disable unnecessary startup programs or potential malware. Other Variants in the Folder: autoruns.exe

: The legacy 32-bit (x86) version of the program. It runs on nearly any Windows PC but handles 64-bit registry locations via emulation.

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. Originally written by Mark Russinovich and Bryce Cogswell,

: If you have a standard 64-bit PC running Windows 10 or 11.

If you are uncertain which file to open, you can identify your processor configuration by executing these steps: Press the to open the System Settings app. Click on System , then scroll down and select About .

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

:Windows will reject the execution immediately. You will be prompted with a standard operating system error stating that the executable "is not a valid Win32 application" or is incompatible with your version of Windows. No harm is done to your system; the binary simply refuses to load.

: Evaluate if you need any advanced features that might be present in Autoruns 64a but not in Autoruns 64.

The key informative feature here is that autoruns64a helps in troubleshooting and understanding the interaction between 32-bit applications and the Windows registry on a 64-bit system. On 64-bit versions of Windows, 32-bit applications that access the registry are redirected to use the Wow6432Node. This means that instead of writing to HKEY_LOCAL_MACHINE\SOFTWARE\YourApp , they write to HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\YourApp .

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