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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).
IMPORTANT: Users are reporting that recent versions of CCleaner do not open when their AV is out of date. If your CCleaner 5.65 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.

6,882 topics in this forum

  1. Flattop1

    By Flattop1,
    • 1 reply
    • 116 views

  2. Unwanted shortcuts after system startup/reboot

    By Rudster,
    • 0 replies
    • 136 views

  3. nmap version wrong - software updater

    By spikeyhair,
    • 3 replies
    • 320 views

  4. Windows 10 protection history clean up

    By sistoiv,
    • 0 replies
    • 1,714 views

  5. ShaunR

    By ShaunR,
    • 1 reply
    • 135 views

  6. Welcome page Open crashes CCleaner

    By lvsunz37,
    • 1 reply
    • 192 views

  7. Ccleaner installer crashes

    By Ccleaner999,
    • 5 replies
    • 570 views

  8. Ccleaner crashes when starting ccleaner

    By Ewald,
    • 3 replies
    • 817 views

  9. James Monroe

    By James Monroe,
    • 0 replies
    • 155 views

  10. CCleaner cant read file size

    By Mostafa,
    • 1 reply
    • 175 views

  11. Cleaner gets deleted

    By rgkelly,
    • 2 replies
    • 215 views

  12. CCleaner stalls when cleaning Firefox - Fixed

    By Georgethedog,
    • 0 replies
    • 196 views

  13. CCleaner 5.54 not detecting or deleting cookies

    By ChrisR64,
    • 13 replies
    • 1,616 views

  14. CCleaner563 Install Problems

    By jxl0928,
    • 7 replies
    • 640 views

  15. CC not authorized

    By Veronica Williams,
    • 3 replies
    • 329 views

  16. Aol downloads

    By Bob Hebert,
    • 1 reply
    • 158 views

  17. CCleaner v5.63 destroy MSOffice after cleaning

    By mod,
    • 1 reply
    • 232 views

  18. "Exécuter CCleaner"

    By HanGilen,
    • 3 replies
    • 301 views

  19. CC won't install into default folder

    By Antonio Cruz,
    • 1 reply
    • 196 views

  20. UninstalItems.log in c:\temp with ccleaner 5.63

    By liamZ,
    • 2 replies
    • 1,266 views

  21. Won't update speed and security

    By sbukosky,
    • 1 reply
    • 454 views

  22. Hieroglyphs in new version of CCleaner 5.63.7540

    By kostmick,
    • 12 replies
    • 784 views

  23. Trojan.PWS.Siggen2.34627 in ccsetup563.exe ?

    By CZ69,
    • 2 replies
    • 604 views

  24. Latest Versiom CCleaner "Dangerous"

    By coover,
    • 5 replies
    • 826 views

  25. Problem with WSCSVC

    By serruf,
    • 1 reply
    • 268 views
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