Hi I am currently running Windows 7 via Bootcamp Assistant on my iMac 2011 Lion. I need to enlarge the Windows partition to 100gb from 50gb, and I would love to go the easy route and simply erase the data on the Windows partition and re-install step by step. However if I delete that partition, am I going to be able to reinstall Windows 7 with the same OEM product key? Or will I be forced to purchase another Windows 7 product key? Any advice is appreciated!