When you delete your Safari browser's history, it's not really completely wiped from your computer. Your computer creates a backup copy of all deleted history in a hidden file known as the index.dat file. Therefore, with the appropriate software, it is possible to restore deleted history in Safari.
Locate an index.dat file reader, and download it to your computer (see Resources).
Click on "Start" and then "Search." Click "Tools" from the horizontal menu bar at the top of the window, and then click "Folder Options." Click on the "View" tab of the "Folder Options" window.
Click on the bubble next to "Show hidden files and folders," and uncheck the checkboxes next to "Hide extensions for known file types" and "Hide protected operating system files."
Search "All Files and Folders" and look in the "C Drive" for the "index.dat" file.
Open the index.dat file inside the index.dat file reader. Click on the Safari history that you want to restore to highlight it, and click the "Restore" button to restore it.
You might have more than one index.dat file on your computer, which is normal.
If the index.dat file has been cleaned, you will not be able to restore deleted history in Safari because no record of it will exist.