liviu

Neat! Thank you. (There are a few more variations like SpecialDetect/Detect#/DetectOS/etc to edit. And the lines in question can also be ";" commented out, or simply deleted.) But this way all options remain in ccleaner.ini, win*1.ini are not used, and therefore the SpecialKey1= worries become moot. Liviu P.S. FWIW here is a batch file to automate the process (must be run at an elevated cmd prompt in vista+). :: ccleaner-nop.cmd -- baseline ccleaner.ini with all options turned off @echo off & setLocal disableDelayedExpansion & pushd "%~dp0" if defined ProgramFiles(x86) (set "cc=ccleaner64") else (set "cc=ccleaner") if not exist %cc%.exe >&2 echo *** error: '%cc%.exe' not found & exit/b 1 :: extract embedded win*.ini files (fails if win*1.ini present !?) for %%v in (winapp1.ini winreg1.ini winsys1.ini) do ( if exist "%%~v" ( 1>&2 echo *** deleting '%%~v' - press any key to continue, or ^^C to abort pause >nul & del "%%~v" ) ) start /wait "" %cc%.exe /export for %%v in (winapp.ini winreg.ini winsys.ini) do ( if not exist "%%~v" >&2 echo *** /export error: '%%~v' not found & exit/b 2 ) :: write ccleaner.ini stub, append [<apps>] except [global], cleanup win*.ini (echo [Options]) (echo CookiesToSave=) (echo RunICS=0) (echo WipeFreeSpaceDrives=) (echo WipeMFTFreeSpace=0) (echo Monitoring=0) for %%u in (winapp.ini winreg.ini winsys.ini) do ( for /f "tokens=1* delims=[]" %%v in ('findstr /r /c:"^\[.*\]$" %%u') do ( if "%%~w"=="" if /i not "%%~v"=="global" (echo ^(App^)%%v=False) ) del "%%~u" ) exit/b 0 %= popd/endlocal done automatically =% ccleaner-nop-502.txt is the result of "C:\etc>cCleaner-nop.cmd >ccleaner-nop-502.txt" (using the current CCleaner v5.02). The file can be copied as ccleaner.ini to the CCleaner directory, and gives a baseline configuration with everything turned off.

That won't work via the user interface, because it only shows - and lets me enable/disable - items that are installed on my machine at that point in time. Suppose, for a simple/silly example, that I run CCleaner portable on my office machine where there is only Internet Explorer installed. I uncheck everything, and copy the files including my just customized CCleaner.ini to a flash drive. Later, I plug the stick into my home machine where I have Chrome and Firefox installed as well. And, surprise, those show up with a lot of options enabled - which I never did enable myself, nor had the chance to preemptively disable in advance. In general, this hidden-yet-enabled-by-default behavior means that one can't know beforehands what exactly will be cleaned on a machine different than the one CCleaner was originally set up on, at least not without reviewing the options every time. This also severely limits the usefulness and transparency of /AUTO.

Thanks, though not sure I am parsing your reply correctly. To rephrase my questions... What I am after is setting up a default config where nothing is "cleaned" by default, no matter what machine ccleaner is later run on. And, where manually enabling a "clean this" target would work just as if the option were never turned off. ( That can't be done via ccleaner.ini alone, since it only holds settings for the machine it is originally being set up on. But CCleaner has many of its 'clean' options enabled by default, and a different machine may well have programs installed which don't show up in the original ccleaner.ini, yet are enabled by default for cleaning in its internal winapp.ini/winsys.ini/etc. ) I thought I could work the "turn all off by default" part by having winapp1/winreg1/winsys1.ini files based on the embedded ones, with just default= changed to =false. But the official docs make no mention of "winreg1" (or winreg2, for that matter). Also, many of the builtin .ini entries make use of a SpecialKey1= entry that the other official doc says doesn't work in external .ini files - which, taken at face value, would mean that a custom winapp1.ini file could never truly duplicate the builtin "clean" action, even if the user later checked the option. So, my question again, is the official documentation incomplete (about winreg1.ini) and wrong (about syskeys), or is it really not possible to force a clean-slate do-nothing base configuration?

I have a couple of questions while trying to configure a portable (free) CCleaner so as to minimize the risk of cleaning unwanted entries on a different machine (and eliminate the need to carefully review the settings each time). Idea was to extract the embedded ini files (using /export), change default=true to default=false for most/all entries, then rename the files to *1.ini. But... https://www.piriform.com/docs/ccleaner/advanced-usage/ccleaner-ini-files/what-do-ccleaners-ini-files-do does a good job explaining the INI overrides, however, it only mentions winapp and winsys. Are winreg1.ini and winreg2.ini supported at all, and do they work the same? https://www.piriform.com/docs/ccleaner/advanced-usage/ccleaner-ini-files/how-to-add-other-areas-of-windows-for-ccleaner-to-clean has a note at the end... ...referring to winsys (there is no such note on the similar page about winapp). Does this mean that it's not possible to create a winsys1.ini which duplicates the embedded one, except it has everything unchecked by default? Thanks, Liviu