Moderators hazelnut Posted May 5, 2021 Moderators Share Posted May 5, 2021 Quote If you are using a device with Microsoft's Windows 10 operating system and Windows Defender as the default security solution, you may be impacted by a bug that is filling the hard drive with files. Windows Defender puts thousands of files in the folder C:\ProgramData\Microsoft\Windows Defender\Scans\History\Store if a device is affected by the issue. More than 10,800 items were placed in the folder on a test system running Windows 10 version 20H2. Other users reported over 950,000 files over the course of a 24 hour period and 30 Gigabytes of storage occupied by the files. Most files are small in size, between 1 and 2 Kilobytes. https://www.ghacks.net/2021/05/05/windows-defender-bug-may-fill-your-hard-drive-with-thousands-of-files/ Support contact https://support.ccleaner.com/s/contact-form?language=en_US&form=general or support@ccleaner.com Link to comment Share on other sites More sharing options...
Moderators nukecad Posted May 5, 2021 Moderators Share Posted May 5, 2021 Haven't we seen that, or a similar, Defender logs bug before? Just checked and It's made 184 entries in that directory so far today, and is creating more as I watch. Most are 2KB but there is one from yesterday that's 2MB. Look at the timestamps here: I've updated Defender as suggested in that article, and deleted all those files and the directory is not filling up again. It isn't a directory that CCleaner cleans by default so if you are affected, and it seem that many/most are, then you'll have to delete them manually. *** Out of Beer Error ->->-> Recovering Memory *** Worried about 'Tracking Files'? Worried about why some files come back after cleaning? See this link:https://community.ccleaner.com/topic/52668-tracking-files/?tab=comments#comment-300043 Link to comment Share on other sites More sharing options...
Moderators hazelnut Posted May 5, 2021 Author Moderators Share Posted May 5, 2021 Supposed to be a fix on the way according to the article. Support contact https://support.ccleaner.com/s/contact-form?language=en_US&form=general or support@ccleaner.com Link to comment Share on other sites More sharing options...
Moderators nukecad Posted May 5, 2021 Moderators Share Posted May 5, 2021 Just updating Defender fixed it for me. The logfiles in the hidden folder still needed manually deleting though. *** Out of Beer Error ->->-> Recovering Memory *** Worried about 'Tracking Files'? Worried about why some files come back after cleaning? See this link:https://community.ccleaner.com/topic/52668-tracking-files/?tab=comments#comment-300043 Link to comment Share on other sites More sharing options...
Moderators Andavari Posted May 5, 2021 Moderators Share Posted May 5, 2021 (edited) I had 816 files in there using about 5MB. I just manually deleted all of it. It's another reason that Nukecad and I noted in a topic from awhile ago why having Defender cleaners in winapp2.ini can be beneficial to removing allot of accumulation it builds up - but that particular folder isn't cleaned by any winapp2.ini entries to my knowledge. Edit: I'm submitting that folder location to winapp2.ini. Edited May 5, 2021 by Andavari Link to comment Share on other sites More sharing options...
trium Posted May 5, 2021 Share Posted May 5, 2021 i have defender never used and nevertheless saved it some files in this folder. but only a few with 700 - 800 kb. some from 2015, 2016 and 2018. (w8.1) Versions of CCleaner Cloud; Introduction Ccleaner Cloud; Ccleaner-->System-Requirements; Ccleaner FAQ´s; Ccleaner builds; Scheduling Ccleaner Free Es ist möglich, keine Fehler zu machen und dennoch zu verlieren. Das ist kein Zeichen von Schwäche. Das ist das Leben -> "Picard" Link to comment Share on other sites More sharing options...
Moderators hazelnut Posted May 6, 2021 Author Moderators Share Posted May 6, 2021 If you cannot get the update for the Defender fix through Win Updates (keeps saying there was a problem and to retry) instead right-click on the Defender taskbar icon and select to update that way. Support contact https://support.ccleaner.com/s/contact-form?language=en_US&form=general or support@ccleaner.com Link to comment Share on other sites More sharing options...
Moderators nukecad Posted May 6, 2021 Moderators Share Posted May 6, 2021 Just to add that if/when you do delete all those files Defender will then think that it has never run a scan, and may prompt you to run one. *** Out of Beer Error ->->-> Recovering Memory *** Worried about 'Tracking Files'? Worried about why some files come back after cleaning? See this link:https://community.ccleaner.com/topic/52668-tracking-files/?tab=comments#comment-300043 Link to comment Share on other sites More sharing options...
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