Purchased an open-box copy of W8-Pro @ Microcenter for about $37 (impulse-buy). I upgraded W7-HP (but backed up the whole drive, 1st). But now, I'm regretting it & want to go back. What is the downgrade situation regarding an OEM "system-builder" copy of W7? Can I just restore my backup & unload the W8 copy on eBay (or such)? -- Life is like a klutz in a nitro plant: one wrong slip & it's all over!