Just don't upgrade to Windows 10... It's full of bugs, really. It completely broke my other PC.
First it gave me blue screens then it fried the motherboard... literaly. All of this happened after I upgraded from Win7 to Win10, I think I'm going to stay with Windows 7 up to July or whenever the free Windows 10 ends otherwise I'm keeping Windows 7, no reason to upgrade. DirectX 12, boowhoo. I don't really think it's big enough for upgrading to a half broken OS.