I am not sure if the question should be post here. As I don't review codes carefully, I am not clear how this software enumerate all kinds of malware. I want to know if this software can detect malware when the malware remove itself from double link list of processes.

It does.

On x64 edition PH hidden process features is disabled on v2.23 (please, see CHANGELOG.txt):

2.23

* FIXED:
* Disabled Hidden Processes feature on 64-bit systems

On x64 edition PH hidden process features is disabled on v2.23 (please, see CHANGELOG.txt):

2.23

* FIXED:
* Disabled Hidden Processes feature on 64-bit systems

Why would it be disabled on 64bit systems?

Because PatchGuard prevents malware from hiding itself, although PatchGuard could be potentially disabled.

Ahh.....I see. Is it really true, or is that what we are told to believe?

Well, PatchGuard indeed works, but there are ways to disable it.

Hmmm... I don't know if I would call that working or not, but I think I know what you mean. Same as most security solutions -- the fix something but no one's found a silver bullet to fix (or protect) everything -- at least not and still have the computer be useful (i.e computer encased in cement is pretty safe from hacking attempts, but its a bit hard to use).