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If you are referring to the date the computer recognizes as the day the OS was installed then it's just stored in the settings of the OS.

Most operating systems maintain 2 dates for every file (some maintain 3 dates) in the file system: creation date, last modified date, (sometimes last accessed date). These are simply the date that was in the system clock when that event occurred.

  • creation date, the date the file was first written
  • last modified date, the date the file was most recently written to
  • last accessed date, the date the file was most recently read from

These 2 (or 3) dates are part of the information stored in the file's directory entry.

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11y ago

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