Permissions issues after installing Windows 10

Fri Jun 3 12:23:05 GMT 2022

On 2022年06月02日 10:14, Bill Stewart wrote:
> On Thu, Jun 2, 2022 at 6:44 AM Brent Epp wrote:
>> In the [Security] tab for these files or directories, under "Group or
>> user names", it lists the owner as "Account Unknown(S-...)". In some
>> cases, these files are completely inaccessible and I can't even take
>> ownership or change the permissions. I have to either restore them from
>> a backup or boot to a Linux environment to access them.
>>> Windows displays "Account Unknown" (with a SID) in the ACL when it can't
> resolve the SID reference.
>> There can be a number of reasons for this. One common reason is that the
> SID belongs to a domain account and the domain is not accessible. Another
> is that the SID belongs to a local account on a different computer (e.g., a
> removable disk is moved between computers and local accounts are in the
> ACL).
This is essentially what happened (removable disk moved from one 
computer to another).
> Well-known SIDs (e.g., S-1-5-32-544 for the local Administrators
> group, etc.) should resolve from any computer.
I would think so too, but that doesn't appear to be happening.If it 
makes a difference, the SID actually starts with S-1-5-21. I have to 
manually take ownership in order to even access the files at all.
  - Brent