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What may be the reason behind the fact that in a digital forensics report (FSL report) of a computer's hard disk, the last logon time of the Administrator user in Windows 7 system is prior to the OS installation date?

Does it infer tampering of the Hard disk before examination?

  • Has the built-in Administrator account ever been used? Does the last logon time default to e.g. build time in such case? – Esa Jokinen Mar 31 at 14:29
  • @EsaJokinen That may be a case.. is there a way to find the default build in time for Windows 7 ultimate? – Gradient Mar 31 at 21:22

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