BebuLamar

CCleaner was used by my IT tech and it wiped off a number of software license I have. It also unregistered some programs and made them not working. It was a pain for me to fix it. Yup the IT people just messed it up they don't know how to fix it.

Bipod

GrandmaG, you are one smart lady. I only use Seagate disk drives (I used to also use Conner--which Seagate acquired--
and Quantum until it was acquied by Maxtor). Back in the era of serial SCSCI bus interface, Seagate drives were used
in mission-critical systems in the telecomm industry.

I haven't bought any product made by WD since the 1990s, when one of the engineers in my group found a bug in a WD
floppy disk controller chip we were shipping in a product. No problem--many chips have bugs--the manufacture just gives
you a workaround. Except WD wouldn't admit the bug--even after we faxed them a photo of the o-screen that proved it
wassn't following the correct timing. We were buying the part to put it in our product--any company that will lie to its
own OEM customer doesn't get my business.

I am not a not an Apple guy. But here are some questions that come to mind:

1. Does MacOS presence of the additional RAM? I think how you check this depends on
the MacOS version.

2. Have you tuned the OS for additional RAM? Chances are a number of parameters
were set for the amount of RAM it was shipped with.

3. Not all RAM is the same. Adding slow RAM could slow down a system--especially
if paging or swapping wasn't the bottleneck. The fastest RAM is static RAM--SRAM--
no dynamic refresh. Very expensive.

4. You aren't going to like this: MacOS is s slow operarting system. That's why Apple
doesn't make a server. God and all his Angels couldn't make MacOS go fast. That
doesn't mean it's not a great single-user home computer OS. It just means if you get
enough concurrent processes going, or mutliple users, or lots of concurrent IO (e.g.
network traffic) it gets really s-l-o-w.

MacOS is based on the NeXTSTEP OS which Apple got when it acquired NeXT Computers.
NeXT OS in turn was based on the Mach microckernel from Carnegie Mellon Univeristy.
NEXT OS also used display PostScript (wonderful, but slow), Objective C (non-standard),
and an object-oriented application layer. I have no idea if Apple kept any of that--but they
definitely kept the Mach microkernel.

I remember when Carnigie Mellon had a booth at the Uniforum trade show to promote
Mach. Every major UNIX OEM manufacturer evaluated it, as did Unix Systems Laboratories,
and none adopated it--they all stuck with monolithic kernels. The reason is performance.

Micorkernels are enormously elegant. Mach uses message passing. I you are a user-level
process that needs something from a disk, you call an an OS entry point, whch queues a message
to the disk manager, that queues a message to the appropriate drive manager. Then the driver
resplies to the disk manger, then the disk manager replies to the kernel, which returns from the
system call. Too many layers--slower than molassis in January. But a tiny, simple kernel--
very elegant, great as a academic research and teaching.

In a monolithic OS (like all other UNIX implementations or MS NT/XP/Vista/Windows7/10
it's a calling interface all the way down to the device driver. The application calls the OS
entry point, and that calls the device driver.. No queuing messages: just push arguments on
the stack then jump. Very fast.

Sorry I can't be more specific--but like I said, I'm not an Apple guy.

Harry0 Loc: Gardena, Cal

Sounds odd. CCleaner has never bothered me, nor anyone else I know.
Yes its' a basic utility. But I have it on autorun at startup. It does it's thing by the time I get back with coffee.
I've been an IT tech for @ 35 years, and I've learned- over and over- don't give the user anything dangerous. CCleaner has always worked well enough, and a no-brainer for most.

Your issue, tho, is different. I had a Windows update do that a year or so ago. During the update, it allowed the half dozen obsolete utils I liked to do their updating. Suddenly my old working paid for version 4.7 became a 30 day trial of version 5.2. That little right=click menu became a page and a half. And all my associations changed to something M$. Again. *sigh*
I'd check all your 3rd party installed utils. He may have installed something else with CCleaner that prides itself for keeping your system updated.

WildBill Loc: South West Florida

You already got an excellent reply but I am going to add to that. CCleaner allows you to do a back-up of the system before you clean the registry. If a real IT was honestly using this (instead of far superior options) he/she should have made a back-up. Also, unless the Tech did a secure wipe of the drive right after running ccleaner, it would be easily restored by any qualified tech. This is a program I let the computer illiterate use so I would suggest you ask other techs in your area the cause of your problem and see if they don't put blame elsewhere as well.

BebuLamar

After they messed it up they leave it to me to contact the software vendor to re activate my licenses. They didn't know anything about my software either. In fact they know nothing of any software that I use often. The initial problem was I can't uninstall a software package to do the update. The run ccleaner trying to fix that but it still didn't uninstall.

WildBill Loc: South West Florida

So sorry you had that experience. I know a lot of great techs but just like every other industry, there are bad apples. I would look online for another computer place that ranks really high with its client base. If you are still having issues, they should be able to help (look for higher than 4 stars and more than 50 reviews if possible). CCleaner can uninstall software but again, armature method not much better than add/remove programs. That is not a program a qualified tech would choose for that problem. You need to find a good tech in your area.

BebuLamar

Oh no I have no choice on that matter. The computer is the company computer and I must use the IT dept to take care of it.

WildBill Loc: South West Florida

Dikdik Loc: Winnipeg, Canada

One place where I work, I use my laptop... I can be working on it before the login screen pops up on the IT desktop. The USBs are active and at the end of the day copy my work to the server.

Dik