Unfortunately, 6.40.11562 runs in the background despite copying over my ini file.
Hi Hmm888:
I only asked about your experience with the installed edition CCleaner Free v6.40 because you are the only Win 10 or Win 11 user I know of who has reported they noticed a difference in behaviour between v6.39 and v6.40. If it turns out that there is a proven problem with CCleaner Free v6.40 processes constantly running in the background then I’ll stop recommending that CCleaner v6.39 users update to v6.40 if they have a Win 10 or Win 11 OS.
I noticed some portable apps like Chrome forks imbed themselves into the system registry so they’re not truly portable.
That is also the case with CCleaner Portable, like most of my other ~ 30 portable apps. See my 23-Dec-2024 topic How to Remove Last Traces of CCleaner Free Portable v6.x?.
Using CCleaner Portable v6.40 with the configuration I described in my 11-Jun-2026 post <above> I currently have :
- 5 registry values at HKEY_LOCAL_MACHINE\SOFTWARE\Piriform\CCleaner
- 1 registry value at HKEY_CURRENT_USER\SOFTWARE\Piriform\CCleaner
- 0 CCleaner-related tasks in Task Scheduler (e.g., CCleanerCrashReporting, CCleaner Update, CCleanerSkipUAC, etc.) NOTE: My setting at Options | Advanced | User Account Control Warning is disabled.
Also note that:
- I’ve created custom inbound and outbound traffic blocks for CCleaner64.exe in my Windows Firewall to minimize telemetry with the backend CCleaner servers as instructed in the How-To Geek article How to Block An Application from Accessing the Internet with Windows Firewall). NOTE: Also see Sampei Nihira’s 05-Jun-2024 post # 171 in the Wilders Security Forums topic CCleaner v6 for a list of modifications they made to their Hosts file to further reduce telemetry with the backend CCleaner servers, which I’ve never tried (and may not still work with CCleaner v.39 and / or v6.40).
- As I stated in my 30-Dec-2025 post <above>, CCleaner is no longer my preferred disk cleaner and I only keep a copy of CCleaner Portable on my USB stick for comparative testing with other disk cleaners.
Dell Inspiron 15 5584 * 64-bit Win 10 Pro v22H2 build 19045.7291 * Firefox v151.0.4 * Microsoft Defender v4.18.26050.15-1.1.26050.11 * Malwarebytes Premium v5.5.7.255-157.0.5633 * Macrium Reflect Free v8.0.7783 * HDCleaner Portable 64-Bit v2.095 * CCleaner Portable 64-bit v6.40.11562