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Customers with an active paid CCleaner subscription can also get direct personal priority customer support here.

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    IMPORTANT: Users are reporting that recent versions of CCleaner do not open when their AV is out of date.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

    36.9k
    posts

  2. CCleaner Help Requests

    Need help installing or using CCleaner on your PC? Be sure to check the Frequently Asked Questions collection from the Piriform support website. If you need information on your paid CCleaner licences, expiry dates, registration information and download links you can get that directly from https://www.ccleaner.com/support/license-lookup. Can't find the answer in the FAQ files? Maybe it has already been asked and answered here - or start your own thread.
    IMPORTANT: Users are reporting that recent versions of CCleaner do not open when their AV is out of date.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.

    3.4k
    posts

  3. CCleaner for Mac

    Post bug reports, suggestions and questions about the Mac version of CCleaner. CCleaner for Mac 1.17, with support for MacOS Catalina was released in August 2019 - if you are having troubles updating from within the product you can download the latest version from https://www.ccleaner.com/ccleaner/download?mac

    1.6k
    posts

  4. CCleaner for Android

    Post bug reports, suggestions and questions about CCleaner for Android.

    578
    posts

  5. CCleaner Suggestions

    Post your suggestions for CCleaner improvements and new features.  The developers keep an eye on this forum for new ideas.  If your suggestion is popular, it may find its way into a future version of CCleaner! Also be sure to check https://ideas.ccleaner.com/

    15.6k
    posts

9,786 topics in this forum

  1. Winapp2.ini additions 1 2 3 4 338

    By Winapp2.ini,
    • 8.4k replies
    • 1.5m views

  2. Tips and Tricks for CCleaner

    By Stephen CCleaner,
    • 0 replies
    • 3k views

  3. Solutions & Workarounds for Issues

    By Stephen CCleaner,
    • 0 replies
    • 2k views

  4. Beginner's Guide

    By TwistedMetal,
    • 3 replies
    • 231.7k views

  5. Information for people wondering about the registry cleaner

    By Winapp2.ini,
    • 22 replies
    • 195k views

  6. CCleaner vs CCleaner Pro? 1 2

    By Jeteroll,
    • 36 replies
    • 180.4k views

  7. Ccleaner Drive wiper 1 2

    By mookey,
    • 32 replies
    • 154.3k views

  8. what is the different of Ccleaner pro edition and business edition?

    By 673,
    • 8 replies
    • 106.2k views

  9. Running CCleaner over a domain to clean profiles 1 2

    By Mauller07,
    • 36 replies
    • 104.3k views

  10. Where to get embedded INI files? 1 2 3 4 6

    By jim75,
    • 140 replies
    • 97.5k views

  11. How To Use: CCleaner /AUTO /SHUTDOWN

    By Andavari,
    • 1 reply
    • 91.4k views

  12. Wipe Free MFT Space?

    By PiriFan,
    • 8 replies
    • 85.9k views

  13. $hf_mig$ folder 1 2

    By CeeCee,
    • 34 replies
    • 73.7k views

  14. Quickie CCleaner FAQ

    By Winapp2.ini,
    • 11 replies
    • 62.9k views

  15. What is MUIcache?

    By luik,
    • 3 replies
    • 59.9k views

  16. CCleaner not deleting Google Chrome History? (FIX)

    By TwistedMetal,
    • 0 replies
    • 58.7k views

  17. What to do with CCleaner on SSD

    By chong67,
    • 11 replies
    • 57.9k views

  18. Intelligent cookie cleaning function

    By Riemen,
    • 9 replies
    • 57k views

  19. Announcement: Security Notification for CCleaner v5.33.6162 and CCleaner Cloud v1.07.3191 1 2 3 4 13

    By Tom CCleaner,
    • 307 replies
    • 55.9k views

  20. CCleaner Pro "Lifetime" Licence - why has it expired? 1 2 3 4 12

    By psychopomp1,
    • 279 replies
    • 55.7k views

  21. Old Prefetch Data

    By SmooveS10,
    • 4 replies
    • 51.6k views

  22. How to enable the CCleaner AUTO parameter

    By Andavari,
    • 12 replies
    • 51.1k views

  23. Does wiping free space delete everything?

    By Jarnorth,
    • 10 replies
    • 51.1k views

  24. What does the Drive Wiper/Free Space thing do ?

    By WBFAir,
    • 7 replies
    • 50.7k views

  25. I need instructions to exclude a registry key

    By khaw,
    • 8 replies
    • 50.1k views
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