Alternatives for CCleaner

Download the latest winapp2.ini from this repo and place it in the same directory as ccleaner.exe.

GitHub - MoscaDotTo/Winapp2: A database of extended cleaning routines for popular Windows PC based maintenance software.

I'll give it a shot and post back.

Edit-

So it adds more programs for cleaning to the Applications list. In Ccleaner when you select the Applications tab it will take a while to load and give you more options.

In short: All that CCleaner does is searches for known Microsoft Windows temporary storage directories (after it searches for existing Microsoft programs).

This is what the entire list ("Windows" | Temp. IE files, History, Cookies, Recently Typed URLs, etc) is all about.
The "Advanced" sub-menu reference ("Windows Event Logs" (capped at a minimum of: 1MB per type of log), Old Prefetch Data (based on timestamp data from files), Menu Order Cache, etc) is more of the same.
The "Applications" are just a list of commonly known programs (based on research data). This is why odd programs will not show (computers aren't voodoo magic, after all).

A lot of the times: People don't understand what a cache is or what it's for. Sometimes programmers will create 'caches' under the guise of false marketing or perhaps ignorance. Sometimes it's for a specialized corner cache. The average consumer or user will presumably be unaware of what's what and how to weigh their options and how to make an educated decision (not to imply there's a high importance, of course).

CCleaner being owned by company XYZ doesn't change the underlying source code of the program. The functionality is all the same. They have the rights to the source code and most likely haven't modified it too much (only adding the addition of advertisement of their other products). They more than likely hired on (or contracted out) the original writers of the program.

The program itself is incredibly simple though, so that may not be true. The maintenance of the software is incredibly low.

What the "Registry" 'cleaner' bit does is runs through the Windows Registry (sloppily at that!) and checks any listed directory path and checks for the existence of the listed directory path/file. If one does not exist: It'll let you know and asks if you'd like to 'clean' (delete) it from the registry.

I don't know if CCleaner itself has the administrative privileges necessary for checking certain registry hive entries (that are otherwise hidden / inaccessible). There's no harm (despite all the propaganda from the internet over the years) in using a 'registry cleaner.' Being able to access a centralized data-center (small at that!) is one of the most powerful tools for tweaking (modifying) or tailoring your OS for your own needs (remember: Windows is a general purpose operating system).

I am sure that CCleaner ignores a lot of potential paths, entire sections and other bits from the Windows registry to prevent accidental 'uh-ohs' on specialized setups of Windows (so they (CCleaner) don't get barked at with 'bad reviews').

Perhaps later in the year, if there's enough demand from this forum: I will invest the time into writing a completely open source and freeware Windows distro cleaner (deleting temporary files, 'caches,' bad paths found in the Windows registry and other common things).

Open source means that the source code (more than likely C++17) will be available to download and review (along with the binary (executable) file).
Freeware means that I will NOT be charging any money. It is 100% free to the end user to do with what they see fit.

Lady Fitzgerald said:

Actually, it can and was. Shortly after AVAST acquired it, CCleaner was caught harvesting user data. The option to block that had been turned off and it became impossible to close down CCleaner once it started. That kind of activity requires a change in the programming. AVAST has since pulled that version.

CCleaner v5.45 Pulled Due to Anger Over Usage Data Collection

If you read the entire post and don't cherry pick it: You'll put what was said back in context.

I was unaware that AVAST pulled that stunt for small gains.

They have the rights to the source code and most likely haven't modified it too much (only adding the addition of advertisement of their other products).

With the exception of the alleged data mining and mild invasion of privacy: That is quite accurate.

Software changes hands like you change under garments.