Autoruns 64 Vs Autoruns 64a Free

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

. 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 autoruns 64 vs autoruns 64a

Comparison

autorunsc.exe: The command-line (CLI) version, useful for scripting or automated analysis. autorunsc64.exe: The 64-bit command-line version. autorunsc64a.exe: The ARM 64-bit command-line version. Pro Tip Here’s a concise explanation of the difference between

Part 4: Do They Produce the Same Results?

This is the million-dollar question. For 99% of standard malware hunting and startup management, both autoruns64.exe and autoruns64a.exe produce identical output when run on the same machine. Scan speed: Autoruns64 is optimized for quick enumeration

• Scan speed: Autoruns64 is optimized for quick enumeration across many startup locations. Autoruns64a performance is similar; added checks (hashing, online lookups) can slow scans unless optional and configurable.
• Resource use: Both are lightweight. Extended features in Autoruns64a (hashing, signature verification) increase CPU and I/O when enabled.

Are you currently troubleshooting a specific startup issue or just cleaning up your system? Which autoruns executable to use? - Microsoft Q&A

Overview

Autoruns is the ultimate startup and persistence viewer, far surpassing MSConfig or Task Manager. With the rise of ARM64 Windows laptops (e.g., Snapdragon X Elite), Microsoft now provides two native 64‑bit builds. At a glance they look identical, but under the hood, architecture matters.