nukecad

This is a problem with your internet provider and nothing that Pirifrom can fix. What has happened is that a number of IP addresses that were issued to 'sanctioned' countries have been reallocated to other countries but the organisation that oversees such things have not actioned the change so they are still being blocked at a high level. You will find that this will affect inatallation/updating of other softwares and not just CCleaner. The best thing that you can do to solve this is ask your internet service provider to allocate a different (older) IP to your router. Another option is to use a VPN to allocate a different IP address. (Which is what people in those sanctioned countries do).

I had the same when installing it yesterday, I just told smartscreen to ignore it and carry on running the installer. It's a button when SS throws a block, there should be no need to turn it off. The block will be simply becase it's new and MS haven't added it to their filters yet.

It may be your firewall settings, see this:

Did you see any error message(s)?

There have been a couple of reports of this behaviour. I would check if anything 'CCleaner' is being blocked by your firewall settings, those two functions need to be able to connect. We have been told by Admin in another thread that you should specifically check that the 'healthcheck.ccleaner.com' web service is allowed through the firewall.

Only 1 flag out of 67 A/V providers on VirusTotal is a good indication that it's a false positive. This particular FP has already been commented on by the Piriform Admin: https://forum.piriform.com/topic/55753-latest-versiom-ccleaner-dangerous/?tab=comments#comment-311444

Probably because ther was a new version, 5.63, realeased earlier today, and Kaspersky have not yet added it to their filters/whitelists.. I got a similiar warning from Windows Smartscreen but ignored it. A Malwarebytes scan of the new installers (which does not rely on whitelists but actually checks the contents of the files) reports them to be clear.

That's probably because a new version, 5.63, was released earlier today (8 hours ago) and Windows has not yet added the new version to the Smartscreen filters. It should be fine later today or tomorrow once Microsoft have updated the filters. I got the same message when installing it earlier today, but just ignored as I knew the probable reason. PS. Scanning the 3 installers (Standard, Slim, and Portable) with Malwarbytes v4.0.2 reports all 3 to be clean.

Yes, they put the official release announcement up four hours ago shortly after I last posted the links on this thread. I believe it may have been this thread (and one in a private staff area) that prompted the official release to clear the confusion between 'official' and 'advance' download links. There are still problems for some in various language versions. I'm not a developer but I do know that Windows has some problems in certain languages with text that uses unicode. The dev's will have to track it down. (But I suspect that it may turn out to be Windows at fault).

I see, that is still not actually the official release yet - it's a tweak to the download address to get an 'advance' copy. The standard link https://www.ccleaner.com/ccleaner/download still gives you 5.62; as does the CCleaner builds page https://www.ccleaner.com/ccleaner/builds

v5.63 is not an official release yet although 'cracked' versions can be found on the web, the current official version is v5.62. I would avoid downloading any 'cracked' version - who knows what malware has been inserted into it? (Many of the sites offering it are blocked by Malwarebytes Browser Guard). The developers are aware of the issue with text in some language versions.

I've pointed this thread out to the Piriform staff, hopefully they will respond soon.

The increase in size will be due to the new Health Check feature which is the next development of Easy Clean. It has a number of new screens and some new coding. https://techdows.com/2019/10/exclusive-first-look-at-ccleaner-health-check-feature.html Not all users will see Health Check in v5.62, (the majority will still see Easy Clean) but the new screens and coding are already in there waiting to be switched on for everybody in a future version. If you are an advanced user familiar/comfortable with editing the registry then you can switch it on yourself in v5.62 by changing a registry entry. https://forum.piriform.com/topic/55670-latest-update-v5627538-different-format-on-pc-and-laptop-health-check/?tab=comments#comment-311110 (Note; I only had to change the first of the registry entries given there to turn it on/off).

I'm not sure just what you are meaning by "CCleaner Properties", are you meaning compatibility mode in the Windows properties dialogue? There is no "Properties" in CCleaner, but it should tell you at the top which OS version it thinks that you have- If yours is not saying Windows 10 then- When, and exactly how, did you upgrade to Windows 10? (When, and they way, you did it could make a difference). ie. Did you use the Upgrade Assistant? or Did you burn an installation CD or make an installation USB? Did you do a completely new install or did you save your previous files and programmes? Did you have CCleaner on the machine before the upgrade? Sorry for all the questions but the answers may help us work out what it is that you are seeing.

Defender/MSE does make a lot of logs, at least one every scan. With Windows 10 Storage Sense will now remove the older ones if you are running low on space, if you have it set to do that, so it 's not that much of a problem. But Win 8.1 and older don't have Storage Sense so the logs can just build up. If you have Win 8.1 or older and turn off cleaning of Defender/MSE then you may want to use Windows built in Disk Clean-up occasionally to clear out the Defender/MSE logs. I suppose Piriform could reprogram CCleaner to leave the latest Defender Scan logs behind, a setting for 'Only Clean Defender logs older than.....' perhaps? Of course that will take more coding and make the CCleaner programme slightly larger again, the growing size of CCleaner has been a niggle for some.

Microsoft Security Essentials is the older name for Windows Defender, the MSE name is still used for Windows 7 or older. (With Windows 8 they changed the name and it became 'built in' as an integral part of Windows). As long as you have Defender unchecked and you always use Custom Clean then it should still be left alone whatever it is called on your machine. However any time that you use Easy Clean then MSE/Defender will be cleared, and the icon will then show yellow (because the scan logs have been cleared it thinks you have never run a scan). Whatever you have ticked or unticked in Custom Clean makes no difference to Easy Clean which uses it's own rules regardless.

You need to be using Custom Clean (not Easy Clean/Health Check which will always delete them). You can set Custom Clean to be the default view in Options>Settings

Simply click on 'Name' (instead of CPU) in the task manager and the processes will be pinned in place by process type and name rather than jumping about to show the most used. Note that FireFox will show processes in both 'Apps' and 'Background Processes' types.

It's on a list to be included in future but I don't think it's a priority. As far as I understand Brave it does most of it's own cleaning anyway, which is the main point of using it. However I believe it is included in the community 'winapp2', or you can add it to ccleaner yourself, see this post for how to do that:

I believe that you have already stated the cause of the problem - Firefox crashed in an unexpected manner, and left some component running. (Sounds like the crash was caused by Yahoo mail, or maybe the contents of one particular email message?) CCleaner eventually recognised that there was something unusual happening and, after asking your permission, forced the rouge process to close. Modern Firefox starts multiple processes, you can see these in Task Manager. Just what was left running after the Firefox crash I suspect will never be know now. As for your other question, I would say that if CCleaner tries to delete something Firefox but Windows says 'you can't delete that because it's still in use' then it's a good assumption that some part of Firefox is still running and using it.

Are you using the Easy Clean option of CCleaner? Easy Clean uses its own settings and will always clean firefox. Instead use Custom Clean which gives you more control over what is cleaned and what is not. You can make Custom Clean the default in Options>Settings>CCleaner Home Screen. In Custom Clean go to the Applications tab where you should find Firefox. Alter the settings for Firefox so that it does not clear your Saved Passwords and Saved Forms, that should stop the loging in issue. (Although for some sites your login status may be saved as a cookie, so you would have to untick 'Cookies' as well if that's the case). Also untick Internet History of you want to retain your browsing history. Here's what mine looks like, you can see that the forms and passwords are unticked so will not be cleaned when Custom Clean is run. (They will still be cleared if I run Easy Clean though). PS. A few users will see the new Health Check instead of seeing Easy Clean, the advice above is the same whichever you see.

They are having a few issues with the licence server and are planning to upgrade it. https://forum.piriform.com/topic/55373-ccleaner-expires-today-3-months-before/?tab=comments#comment-311064 In the meantime these suggestions about new licence registrations may help: https://forum.piriform.com/topic/55373-ccleaner-expires-today-3-months-before/?tab=comments#comment-310162

You need to use the Custom Clean and in the Applications tab untick the entry for 'Adobe Reader DC'. If you use the Easy Clean then it will always delete Adobe Reader files. (Even if you have unticked it in Custom Clean).

The option is "Wipe MFT Free Space" - not delete the MFT. (Which is not something you should do anyway, it would make your computer unusable). From the CCleaner documentation:

Mmm. It may be that the first install with health check has set a registry entry which also triggers it in the later download. (I recall similar when Quick/Easy clean was being trialed, I could turn it on and off by changing a reg entry). I've not seen Health Check yet other than screenshots, but suspect it may be being "previewed" in the same way. I'm not at home at the moment but when I am I'll have a search of my registry to see what I can find. If you uninstall CC and then reinstall from the builds that may get rid of it for now. As you have a pro version you can raise it with support (sorry can't link from this phone) but TBH just like Easy Clean did, Health Check is coming and everyone will get it, probably with v5.63?