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CCleaner Bug Reporting

Is CCleaner not working properly on your system? Then let us know (with details to help us hunt down the problem to solve it for you and for others).
IMPORTANT: You may experience problems running CCleaner if your AV definitions are out of date. If your CCleaner has stopped working and you are using an old version of Trend Micro antivirus protection, you will need to update your Trend Micro from here https://esupport.trendmicro.com/en-us/home/index.aspx.

7,540 topics in this forum

  1. CCleaner 5.74 secure erase and Windows 10 explorer.exe RAM consumption

    By pasc92,
    • 2 replies
    • 956 views

  2. Vivaldi not cleaned by CCleaner Professional 5.75.8238

    By xClean,
    • 1 reply
    • 515 views

  3. Google Chrome Smart Cleaning Not Working

    By zorvek,
    • 1 reply
    • 818 views

  4. CCleaner v.5.74 sometimes does not show its icon in the notification area

    By macchan,
    • 5 replies
    • 1.1k views

  5. CCleaner crashing mid-clean

    By Kalema1954,
    • 1 reply
    • 791 views

  6. Health Check "unable to reach server" message [fixed in version 5.65] 1 2 3 4

    By kmenlopark,
    • 75 replies
    • 18.3k views

  7. Launch CCleaner on Windows Start is off - yet it still does it

    By Anachron101,
    • 3 replies
    • 1.3k views

  8. v 5.75 install problems

    By jopa66,
    • 8 replies
    • 1.7k views

  9. CCcleaner free version being flagged as PUA:Win32/PiriformBundler [solved]

    By bnesbittok,
    • 4 replies
    • 6.8k views

  10. CCleaner disappears from the task bar 1 2

    By Doupax,
    • 38 replies
    • 5.5k views

  11. CCleaner...I want a divorce...

    By StraightUp,
    • 8 replies
    • 1.4k views

  12. [SOLVED] Latest CCleaner CRASH

    By Akakima,
    • 1 reply
    • 1.4k views

  13. CCleaner Bomb

    By nakewe3,
    • 1 reply
    • 776 views

  14. Duplicate Items Are Listed To Be Cleaned After Analysis in V 5.75.8238

    By DonT5,
    • 1 reply
    • 518 views

  15. v5.74 occasional dmp-files [solved in 5.75]

    By mogli,
    • 13 replies
    • 3.2k views

  16. cc v5.75 from 10.12.20 redirection doesnt work

    By trium,
    • 3 replies
    • 665 views

  17. CCleaner 5.75.8238 check for update error

    By TheOwner,
    • 2 replies
    • 1k views

  18. CCleaner v5.75.8238 Announcements Forum Posting Wrong Version Number (5.74)

    By cbaumer0628,
    • 1 reply
    • 669 views

  19. CCleaner APPCRASH v5.74

    By k6whp,
    • 10 replies
    • 1.9k views

  20. CCleaner not working

    By UmbertoFrancesco,
    • 12 replies
    • 779 views

  21. CCleaner keeps reporting cleaning of browser while not in use

    By alejack12001,
    • 1 reply
    • 521 views

  22. Microsoft Exploit Guard has blocked an operation

    By mjohnsonn,
    • 0 replies
    • 1.1k views

  23. Newest Version 5.74.8198 64bit of CCleaner Crashing

    By DonT5,
    • 2 replies
    • 1.8k views

  24. Smart Cleaning UI display bug. (German language).

    By MSK_Linz,
    • 1 reply
    • 497 views

  25. CCleaner 4.75.8198 in Windows 10 Prof. 64-bi generates error messages

    By Rothirsch,
    • 1 reply
    • 405 views
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