Go to Settings > System > About and look at "System type." Intel/AMD Processor: Run autoruns64.exe . ARM Processor: Run autoruns64a.exe .
Regardless of which version you choose, here are some best practices for using Autoruns: autoruns 64 vs autoruns 64a
To understand the split, you need to know how Windows handles 32-bit vs. 64-bit processes, and how the Sysinternals team evolved Autoruns over time. Go to Settings > System > About and look at "System type
For example:
Choosing the wrong one usually results in an error message or a failure to launch. Use Autoruns64 if: You have an or AMD CPU. You are running a standard version of 64-bit Windows. You aren't sure (this is the safe bet for 95% of users). Use Autoruns64a if: 64-bit processes, and how the Sysinternals team evolved
I tested both versions on a Windows 11 Pro system (32 GB RAM, Intel i7-12700K, NVMe SSD). The test machine had 3,400 auto-starting entries (including services, scheduled tasks, drivers, and logins).