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Understanding the Windows Pagefile and Why You Shouldn't Disable It - Windows - Lifehacker
Properly Erase Your Physical Media - Hard Drives - Lifehacker
"ion
The first step in securing your data is bolstering your understanding of how data is stored and what happens when you delete it. Many people operate under the impression that when they delete a file it's gone, as though they had torn a page from a book. But the way most operating systems handle such events is by simply removing the little marker that points to the file. That's more like having information written on a chalk board in columns, each column labeled with a header, and then simply erasing that header to signify that column is "deleted" and available for future writing over. Anyone who looks at the board can read everything written in the column, until someone starts writing over it.
What does this mean for your data privacy? It means a computer-savvy middle school student could recover a filed deleted in Windows, with little effort and widely available freeware tools. You need tools that will actually wipe the chalk board clean."
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