How to set up a file that works only on a particular computer [closed]

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I need to protect a file or folder and prevent it from being copied. I mean, when users try to copy it on external drive or send the file via email - it won't work on theirs machines.

Windows 7 and XP are my targets.

Answer 1

One way to do so would make the file a system file; if it doesn't need to be edited make system32 the owner of the file. When you do that' it's almost invisible so the user won't know it exists....Unfortunately, it's not possible to prevent copying of a file if it's executable.