How do I install install process explorer? Which version of the installer should I use and why?

Question

Background / Context (or see TLDR below)

I am trying archive deeply nested directories and need a work around for the 260 character limit for path file names in Windows. I've modified the following registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem LongPathsEnabled

and now I need to edit the app manifest to include the following:

• <windowsSettings> <longPathAware>true</longPathAware> </windowsSettings> https://learn.microsoft.com/en-us/windows/win32/fileio/maximum-file-path-limitation

I'm not able to save the manifest due to a permissions issue after taking ownership and I'd like to see if there is a process with a lock on the file.

TLDR

There are 3 different versions of the installation file.

1. procexp.exe
2. procexp64.exe
3. procexp64a.exe ?? (portable? That would be nice)

WHICH INSTALLER SHOULD I USE AND WHY? Other

I understand that versions (1) and (2) above are likely 32-bit and 64-bit versions, but I don't understand why 32-bit versions are always offered. Aren't all supported Windows systems 64 bit? Is this for legacy / hobby?

Moreover, I would like to know what the '64a' version (3) is for.

The documentation o0n installation that I found mentions only version(1) and the he link to the Q&A is a dead link.

Please advise

Article: Process Explorer v17.065, Mark Russinovich and 12 contributors, May 28, 2024

Article Text:

Installation

Simply run Process Explorer (procexp.exe).

The help file describes Process Explorer operation and usage. If you have problems or questions, visit the Process Explorer section on Microsoft Q&A (no relevant info)

https://learn.microsoft.com/en-us/sysinternals/downloads/process-explorer