This will be the first time doing this with Win 7, I bought an OEM disk with my HDD upgrade last time around. Which I installed as a new setup vs an upgrade from XP
If I format C: and go with a fresh install, will I have a problem getting Windows activated?
Shouldn't be an issue with OEM Win 7 unless you've switched out your motherboard. OEM Win7 is tied to the Mobo.