Maybe some of you guys and gals that play Windows games using a Bootcamp partition on you iMac or MacBook Pro can give me an answer. I used a 70GB partition. I installed Windows 7.1 Professional and now am attempting to install Windows 10. The installation program comes back and says I need to have a least 8GB on the hard drive. I check and I have only 6GB left. Why is the Windows 7.1 install so large? What can I delete? Thanks.