Duplicate ACLs? - Can't copy file even with Admin permissions

[cygwin@kosowsky.org]

Subinacl is pre-installed on the version of Win10 I got from MSFT.

Andrey Repin wrote at about 21:05:48 +0300 on Thursday, January 6, 2022:
 > Greetings, Corinna Vinschen!
 > 
 > > On Jan  3 10:51, cygwin@kosowsky.org wrote:
 > >> I have a file: /c/Config.Msi/3da9e136.rbf that I cannot copy, even when
 > >> [...]
 > >>       # getfacl 3da9e136.rbf
 > >>       # file: 3da9e136.rbf
 > >>       # owner: Administrators
 > >>       # group: SYSTEM
 > >>       user::rwx
 > >>       group::rwx
 > >>       other::r-x
 > >>       user::rwx
 > >>       group::rwx
 > >>       group:SYSTEM:rwx
 > >>       mask::rwx
 > >>       other::r-x
 > >> [...]
 > >> Note that 'subinacl' shows:
 > >> =================================
 > >> +File C:\Config.Msi\3da9e136.rbf
 > >> =================================
 > >> /control=0x0
 > >> /owner             =builtin\administrators
 > >> /primary group     =system
 > >> /audit ace count   =0
 > >> /perm. ace count   =3
 > >> /pace =system  Type=0x0 Flags=0x3 AccessMask=0x1f01ff
 > >> /pace =everyone  Type=0x0 Flags=0x3 AccessMask=0x1200a9
 > >> /pace =builtin\administrators  Type=0x0 Flags=0x3 AccessMask=0x1f01ff
 > 
 > > I don't see a reliable, trustable source for downloading subinacl, so
 > > let's do this with builtin tools.
 > 
 > https://download.microsoft.com/download/1/7/d/17d82b72-bc6a-4dc8-bfaa-98b37b22b367/subinacl.msi
 > Since installer is signed, you can verify its integrity.
 > 
 > 
 > -- 
 > With best regards,
 > Andrey Repin
 > Thursday, January 6, 2022 21:05:06
 > 
 > Sorry for my terrible english...
 > 
 > 
 > -- 
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