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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IMPORTANT: You may experience problems running CCleaner if your AV definitions are out of date.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. Upgrade not working

    By KSCPDX,
    • 1 reply
    • 363 views

  2. running tuneup

    By Freddy69,
    • 1 reply
    • 579 views

  3. FYI: CCleaner Stopped Running Because of Video GPU - Fixed

    By SoundAssets,
    • 1 reply
    • 358 views

  4. Last upgrade created duplicate entries for everything

    By Guardian,
    • 1 reply
    • 521 views

  5. BUG

    By Denis Cloutier,
    • 1 reply
    • 3.1k views

  6. CCleaner Portable leaves some keys under registry

    By Andhika,
    • 1 reply
    • 929 views

  7. licence

    By lucpeeters,
    • 1 reply
    • 653 views

  8. Problem for register button

    By windowsswiss,
    • 1 reply
    • 1.1k views

  9. Impossible install ccsetup pro 551.exe on Win 10

    By Xavier DUPAS,
    • 1 reply
    • 729 views

  10. CCleaner and an SSD

    By Lachlan,
    • 1 reply
    • 611 views

  11. v5.51.6939 not deleting cookies on close in Opera Browser

    By colvingoree,
    • 1 reply
    • 871 views

  12. licence key not working

    By greenhall,
    • 1 reply
    • 642 views

  13. Most Recent Download - Viruses

    By jewl,
    • 1 reply
    • 519 views

  14. ccsetup549 Installation error Windows 10

    By twobluecrows,
    • 1 reply
    • 1.1k views

  15. Chrome sections skipped in cleaning

    By billj9999,
    • 1 reply
    • 308 views

  16. CCleaner made Thunderbird forget itself

    By leuce,
    • 1 reply
    • 872 views

  17. c cleaner 5.50 installation

    By dermotk,
    • 1 reply
    • 535 views

  18. 5.50 install isn't Ok

    By OLHAGARAY,
    • 1 reply
    • 865 views

  19. Update to 5.50.6911 not working

    By Top Cat,
    • 1 reply
    • 544 views

  20. Internet exploer - cookies skipped v5.50

    By jorb,
    • 1 reply
    • 430 views

  21. ccsetup550 Norton not allowing it to download

    By rh049,
    • 1 reply
    • 536 views

  22. customer support

    By dwillia54,
    • 1 reply
    • 463 views

  23. Computerbild Lizence Code does not work

    By tbmuc,
    • 1 reply
    • 780 views

  24. My Solution to CCleaner being very slow

    By Farmboyco,
    • 1 reply
    • 429 views

  25. 5.49 install isn't Ok

    By OLHAGARAY,
    • 1 reply
    • 722 views

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