Ok, so I just completed my new build. I'm using some existing parts, but new CPU, motherboard, case, and RAM.
I'm using my old 1 TB hard drive from my last machine and I haven't wiped it clean to start over. I'm running the same windows install from the previous machine. After one day of running, so far it seems quite stable. No problems whatsoever thus far. I bought a new copy of Windows 7 (the copy on my hdd came pre-installed because it was a store bought PC), but now I'm wondering if I should return and just see how the computer handles the old OS install. Am I fooling myself? Am I bound to have problems so I should just get the fresh install over with now? I'd love to save the $100 as money is a little tight these days.