Hi guys, I'm trying to run windows on my iMac 27" (Mid 2010) running 10.7.3 and everytime I get to the partioning step, I choose how much I want to dedicate to windows and it will run for a few minutes and then say "Back up the disk and use Disk Utility to format it as a single Mac OS Extended (Journaled) volume. Restore your information to the disk and try using Boot Camp Assistant again." I'm not really sure as to why this is happening, from what I've read it's because I need to defrag my comp (still fuzzy as to what that means) which I can do either with software or restoring my computer from a back up on my external hard drive. If I need to restore, how long do you think it would take (I have 463.97 GB used)? Any other tips or advice would be greatly appreciated, I want to get windows running asap! Thanks If I'm missing any key info or anything for you guys to figure out the issue, please let me know and I'll get it to you guys asap.