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Subject: Re: Can I find where cygwin is installed (for automation purposes)
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From: Marco Atzeri via Cygwin <cygwin AT cygwin DOT com>
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Am 15.04.2020 um 15:29 schrieb Paul Moore via Cygwin:
> On Wed, 15 Apr 2020 at 11:54, Csaba Ráduly via Cygwin <cygwin AT cygwin DOT com> wrote:
> 
>> On my machine, I have a
>>
>> HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin\setup
>>
>> key, which contains a string value named "rootdir" with the date "C:\cygwin64".
> 
> Thanks, that looks more useful. I didn't think to check there as I
> didn't recall having run the setup as "All users" so I assumed
> everything would be in HKCU. I should have checked!
> Paul
> --


Pay attention that Setup links to the last updated one 64 or 32bit

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin\Setup
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Cygwin\Setup

Installations report all if more are installed (borderline case, maybe)

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin\Installations
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Cygwin\Installations

both version 32 and 64 bit are reported on

Computer\HKEY_CURRENT_USER\Software\Cygwin\Installations

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