I recently update from Windows 10 v1803 to Windows 10 October 1809 and I can't clean Windows System event log.
The program clean apps and other logs in windows event viewer but system log clean is not working.
I installed some lower older version to try but not working too. Seems to be a problem with the latest microsoft update or anything similar. I don't know.
Starting with CCleaner 5.47.6716, every version has been partially broken by Windows 10 1809. I posted the following in October and in the thread, Piriform said they were working on a fix. It still hasn't happened. And yes, it does not clean the event log.
CCleaner also used to clean the Windows 10 Reliability Monitor. That stopped as well when 1809 came out. May as well wait. In a few months there'll be another Windows 10 Feature Update to mess everything up.
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I still stick to my desire NOT to have Reliability History or Event Viewer logs cleared by CCleaner.
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@hazelnut-- I do agree with you -- just answering a question posed by the original poster. But, I think the underlying issue is that what was referenced by the OP used to work, no longer works and hasn't worked since last October and Piriform promised a fix. That's in the thread I linked to above in the fourth post. One should not promise what can't (or won't) be delivered.
@Dracman -- As I have Windows 10 Home, GP is out and I will not go to the registry. What I've been doing is cleaning Edge from within the browser (settings>privacy & security>browsing data). When I run CCleaner, I'll get the pop-up to close Edge, do that, and then CCleaner will skip some items. I can live with it. Piriform has to come up with the solution -- if there is going to be one. Also note -- some posters have reported that opening and then closing Edge has occasionally worked better for CCleaner. I haven't noticed any difference.
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<strong>How to disable pre-launching and pre-loading so CCleaner can fully clean Edge</strong>
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This solution:
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<a href="https://www.ccleaner.com/docs/ccleaner/troubleshooting/how-to-disable-pre-launching-and-pre-loading-so-ccleaner-can-fully-clean-edge" rel="external nofollow">https://www.ccleaner.com/docs/ccleaner/troubleshooting/how-to-disable-pre-launching-and-pre-loading-so-ccleaner-can-fully-clean-edge</a>
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...<strong>does not work!</strong>
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Doesn't work because those registry keys do not exist, more than one person has posted about it not working. I'm surprised they haven't fixed those instructions yet.
See if this here works instead (allows you to make a working .REG file):