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permissions changing without notice

Discussion in 'Windows XP' started by John, Jun 3, 2010.

  1. John

    John Flightless Bird

    I have this very strange problem and I hoped all you knowledgable techs might
    have an answer.
    Some background: late last year one of my customers had data corruption on
    one of their computers. I restored the corrupted data from a backup but
    noted there were disk errors on the main hard drive in Event Viewer. I
    suggested replacing the computer which the customer did. I installed all the
    user data and setup the computer. But the new computer started getting disk
    errors also. I finally traced the problem to a bad external backup drive
    that was causing data corruption on the main HD only, and only when Windows
    Backup started. I removed the bad external drive and the disk errors
    stopped.
    My problem is that since then sometimes on some files and folders
    seemingly without warning, their access permissions will change. Even after
    explicitly setting the permissions on the folders some of the files in those
    folders will become inaccessable unless I use the local admin account to take
    ownership and then re-add the permissions manually. I have reset the
    permissions at the folderlevel but not all the files in the folder change
    their permissions. I have to change the permissions on each file manually.
    The computer is running Windows XP Pro. Let me know if you need more
    information.

    Thanks in advance.

    John
     
  2. Tim Meddick

    Tim Meddick Flightless Bird

    Have you tried removing the SYSTEM entry on the folder's permissions, from
    the users granted access?

    Or even adding SYSTEM entry but with all "denied" permissions, for that
    folder structure...

    (It is usually the SYSTEM that is responsible for changing (re-setting)
    file & folder permissions).

    ==

    Cheers, Tim Meddick, Peckham, London. :)




    "John" <John@discussions.microsoft.com> wrote in message
    news:2EE1E86A-F388-4F01-8F37-E60D5079B56D@microsoft.com...
    >I have this very strange problem and I hoped all you knowledgable techs
    >might
    > have an answer.
    > Some background: late last year one of my customers had data corruption
    > on
    > one of their computers. I restored the corrupted data from a backup but
    > noted there were disk errors on the main hard drive in Event Viewer. I
    > suggested replacing the computer which the customer did. I installed all
    > the
    > user data and setup the computer. But the new computer started getting
    > disk
    > errors also. I finally traced the problem to a bad external backup drive
    > that was causing data corruption on the main HD only, and only when
    > Windows
    > Backup started. I removed the bad external drive and the disk errors
    > stopped.
    > My problem is that since then sometimes on some files and folders
    > seemingly without warning, their access permissions will change. Even
    > after
    > explicitly setting the permissions on the folders some of the files in
    > those
    > folders will become inaccessable unless I use the local admin account to
    > take
    > ownership and then re-add the permissions manually. I have reset the
    > permissions at the folderlevel but not all the files in the folder change
    > their permissions. I have to change the permissions on each file
    > manually.
    > The computer is running Windows XP Pro. Let me know if you need more
    > information.
    >
    > Thanks in advance.
    >
    > John
     
  3. John

    John Flightless Bird

    No I haven't. Interestingly when I change the owner of the file to the admin
    account I can then see that the original owner and the sytem are listed as
    having access but not before. The only time I have seen this before is when
    certain viruses try to protect themselves and change the file permissions.
    But this is not a virus issue. Thanks for the tip.

    John

    "Tim Meddick" wrote:

    > Have you tried removing the SYSTEM entry on the folder's permissions, from
    > the users granted access?
    >
    > Or even adding SYSTEM entry but with all "denied" permissions, for that
    > folder structure...
    >
    > (It is usually the SYSTEM that is responsible for changing (re-setting)
    > file & folder permissions).
    >
    > ==
    >
    > Cheers, Tim Meddick, Peckham, London. :)
    >
    >
    >
    >
    > "John" <John@discussions.microsoft.com> wrote in message
    > news:2EE1E86A-F388-4F01-8F37-E60D5079B56D@microsoft.com...
    > >I have this very strange problem and I hoped all you knowledgable techs
    > >might
    > > have an answer.
    > > Some background: late last year one of my customers had data corruption
    > > on
    > > one of their computers. I restored the corrupted data from a backup but
    > > noted there were disk errors on the main hard drive in Event Viewer. I
    > > suggested replacing the computer which the customer did. I installed all
    > > the
    > > user data and setup the computer. But the new computer started getting
    > > disk
    > > errors also. I finally traced the problem to a bad external backup drive
    > > that was causing data corruption on the main HD only, and only when
    > > Windows
    > > Backup started. I removed the bad external drive and the disk errors
    > > stopped.
    > > My problem is that since then sometimes on some files and folders
    > > seemingly without warning, their access permissions will change. Even
    > > after
    > > explicitly setting the permissions on the folders some of the files in
    > > those
    > > folders will become inaccessable unless I use the local admin account to
    > > take
    > > ownership and then re-add the permissions manually. I have reset the
    > > permissions at the folderlevel but not all the files in the folder change
    > > their permissions. I have to change the permissions on each file
    > > manually.
    > > The computer is running Windows XP Pro. Let me know if you need more
    > > information.
    > >
    > > Thanks in advance.
    > >
    > > John

    >
    > .
    >
     

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