• Windows 7 Professional, Enterprise, and Ultimate editions enable you to restore a previous version of a file. Use this tab to restore a previous version of a file after it has been modified or deleted.
  
• Previous versions of a file on the local computer are generated by a backup or shadow copies.
• Shadow copies are a system in which the computer takes a snapshot of files at a specific point in time and then tracks changes to those files.
• There are two sources for previous versions:
  • Backup copies (created with the Windows Backup Wizard)
  • Shadow copies (created as part of a volume restore point)
• If you have overwritten a file and want to retrieve a previous version, right-click the file and select Properties. Click the Previous Versions tab to see what backup or shadow copies may exist
• If more than one previous version exists, select the one you want to use, and choose from the following options:
  • Open: The previous version is opened by the default application for the file type. The current version is retained.
  • Copy: The previous version is copied to the destination you specify.
  • Restore: The previous version replaces the current version. After selecting this option, you must click Restore to confirm the operation.

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