I currently switched from a 32bit Win 7 OS to a 64bit Win 7 OS. I did so by installing windows on a second drive. This way I could freely move files between drives with minimal effort. My 32bit OS created a 100MB hard drive partition. That is for boot/recovery files right? I formatted that drive to remove the 32bit OS. Windows still believes I have dual boot system. When I turn on my system, it asks me which Win 7 I would like to boot. Once I’m at my desktop the partition is still in use so I can’t format it. I don’t know what to do here so I can format the drive and remove the partition.