Permissions Bypass

I know someone who has a computer that has a hdd from another computer. The other computer died. The files on the hdd are very valuable to this person, but they can't be accessed. These are windows xp computers by the way. When one of the files are clicked on it asks for a username/password. No matter what is entered it doesn't work. I was wondering if I boot on a Linux live cd (I think I have Ubuntu sitting around somewhere) can I copy the files to another hdd and have access to them. If this works I can copy the file to another hdd, reformat the hdd with original files, then copy them back and have access to them. If so should the other hdd be fat32 so access permissions are not copied and it is still accessible to Linux and XP. Any other method of accomplishing the task of bypassing permissions would be appreciated.
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More about permissions bypass
  1. If it's simply a permissions issue then an Administrator ought to be able to access these files (or change ownership and then be able to access the files). Sounds to me as if the file system might be encrypted - if that's the case then I'm afraid you're stuck.
  2. I know it wasn't encrypted. It tried doing something with permissions, but it was so long ago I don't remember what. It would ask for a password, but the password of the old and the new system didn't work. I'll try to take ownership, but I'm not sure that it'll work. I've similar problems with my Vista machine. I've reinstalled many times on it and I find files that I cannot access.
  3. Image the original disk to another drive then put the original disk in a bank vault and leave it there.

    Try to mount the image using ubuntu 8.10 or fedora 10 and see if the files are readable.

    As ijack said, if the files are encrypted you're in trouble, although with enough time, effort and resources you may be able to decrypt the files.

    You shouldn't work on the original drive because it's way too easy to foul it up.

    Good luck :)
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