CCleaner will not open from desktop icon when version updated.

In recent months, when CCleaner has been updated it will not open from the desktop icon. Instead I have to Google CCleaner and open from there. I can usually open CCleaner without any problems but not when it has been updated. Any ideas please?

I'm not sure what you are meaning there, but I think you mean that you are having to reinstall CCleaner again because it will only run the one time when you reinstall?

Normally if CCleaner will run once on installing but then won't open again from the desktop it's your Antivirus that is stopping it from opening.

(It doesn't stop the first one because that's not opening from scratch on your computer, it's opening from the installer which itself is already open).

What you describe shows exactly that behaviour:

  1. There is a new CCleaner version and your Antivirus doesn't recognise the new version and so (after that first time) blocks it from running.
  2. A day or so later (it could be just hours, with some AVs it could be a week) the antivirus definitions are updated, the AV now recognises the new CCleaner and doesn't block it anymore.

Some AVs are more prone to this behaviour than others, and many don't have this problem at all.

Can you tell us what Antivirus are you using and what version is it at?

Sorry, not very clear. I am using Norton and Norton tells me that I am using the latest version. I have used CCleaner for ten years or more and normally if there is an update, when I open CCleaner there is an option to update (I always do). In recent months I have always been able to open CCleaner from my desktop icon EXCEPT when there has been an update when CCleaner will not open. I then have to Google CCleaner and download the update from the web site and all is OK. Until there is another update I can open CCleaner from the desktop icon as usual. Never had a problem before and have run Norton for many years. Using Win 10 21 H1.

16 hours ago, Judesman said:
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		Sorry, not very clear. I am using Norton and Norton tells me that I am using the latest version. I have used CCleaner for ten years or more and normally if there is an update, when I open CCleaner there is an option to update (I always do).  In recent months I have always been able to open CCleaner from my desktop icon EXCEPT when there has been an update when CCleaner will not open. I then have to Google CCleaner and download the update from the web site and all is OK. Until there is another update I can open CCleaner from the desktop icon as usual.  Never had a problem before and have run Norton for many years. Using Win 10 21 H1.
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That's fine,

so it's when you update through CCleaner itself that you have the issue, but when you download a new installer from the website and install afresh then there is no issue.

Are you letting CCleaner update automatically, or just getting a notification that the update is available and then clicking the button?

Whichever, that does still sound like your Norton AV blocking it unless/until you do a new install.

It sounds that when updating from within CCleaner your AV may still be using the old version checksum, which of course doesn't match the new version


Note that a 'Restart' of Windows ('Restart' not a Shutdown/Boot), rather than a fresh install should also cure it.


But you shouldn't really have to do either.

It's also interesting that you say 'in recent months' - it has been noticed that due to the pandemic with people working from home some AVs have been slower than usual to update definitions, which has led to some delays in them recognising new software versions. I'm not sure if this has been affecting Norton?

(PS. I don't update from within CCleaner itself, I always download the new version from the 'Builds' page and do a fresh install using the 'Slim' installer, many experienced CCleaner users do their updates that way: https://www.piriform.com/ccleaner/builds ).

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		Norton tells me that I am using the latest version
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As I said above an AV telling you that it is the latest version is not always true, you have to double check the website.

There are a few different Norton AV's - can you tell us which one you have and the actual version number of your Norton product?


For most of them the latest version as of 20th August 2021 is <strong>22.21.6.53</strong>

https://www.nortonlifelockpartner.com/faq/art/what-is-the-latest-version-of-norton-security/

3 hours ago, nukecad said:
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		That's fine,


		so it's when you update through CCleaner itself that you have the issue, but when you download a new installer from the website and install afresh then there is no issue.
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That's exactly it. Once a new update has been issued I cannot open CCleaner from the desktop.

I usually update from the programme when I see that an update is available. Normally I wouldn't know that a new update is available until I open CCleaner.

I am using Norton 360. Norton tells me that it is up to date and I have run the updater but cannot find any trace of the version number on my prog and wouldn't know where to look. I have been using CCleaner for many years without any problems.

Thanks for all your help.

In Norton 360 the version number should be shown in Help>About

https://www.nortonlifelockpartner.com/faq/art/how-do-i-check-the-version-of-my-norton-security-software-including-patch/

TBH I'm not 100% sure what is causing your issue - but still strongly suspect Norton, the behaviour you describe is typical of an AV block (and we do see it quite often with certain AVs).

(Just as an aside, I wonder if it would still do it if you had 'Keep CCleaner Updated Automatically' selected so that CCleaner would update itself in the background?).

Personally I would still let CCleaner tell you there is an update but decline it and instead go the CCleaner builds page that I linked above above, download the Slim installer from there and double click it to install the new version. (Slim installs the same CCleaner as Standard, but doesn't show you an 'offer' while doing it).

There is no need to unistall the old CCleaner version first.


You may want to bookmark that link to the builds page so it's easily found.


As I said, quite a few of us do it that way every update.

Updates are usually about once a month, so you could also check the announcements on here.

It's a few more clicks, but as you will be installing anew each time then that should then bypass the problem you are seeing.

If you do still want to update through CCleaner itself then I'd suggest that you try a 'one-time' uninstall and reinstall of CCleaner which should clear out any 'old' CCleaner settings from Windows that Norton may be picking up. It's just possible that there may be something left over from an older CCleaner version in the registry.

(To keep your current CCleaner settings make a copy of your ccleaner.ini file, if you have one, and put it back after the reinstall).

Thanks again. Yes, I do have the correct Norton Version. (I didn't know where the V number was hiding so thanks)

1 hour ago, nukecad said:
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		Personally I would still let CCleaner tell you there is an update but decline it and instead go the CCleaner builds page
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I cannot decline the update because CCleaner won't open when there is an update, so I don't know except for the fact that it won't open.

I might try your uninstall/re-install option.

Thanks for your help, I will have a look at the builds page (Fell for the offer once before, what a pain.)