Hi, i have been trying all day to install windows 7 on my iMac 21.5 mid 2010 model. I have got two genuine windows iso files, one ultimate and one home premium I have tried using disk utility to burn them and when running bootcamp, upon restart i get the no bootable device. I have tried using vmware to virtual windows and used the Windows USB/DVD creator but the burn fails at 99%. I have tried making a bootable usb drive with bootcamp, using dos command prompt and using windows usb creator. again all i get is no bootable device. I have ran out of dvd-r's and almost ran out of patience. Any ideas of what is going on?