Which Operating System Should I Use?

TheCraftingProz

Reputable
May 1, 2015
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I have a Dell Dimension E520. It has an Intel Core 2 Duo (3.0 GHZ), and 2GB of RAM. It currently has no operating system. I was thinking about putting Windows XP Professional, but that has no security updates. Other than that there is Windows Vista and Windows 7. Which one would run best? Thanks.