I am unable to load my operating system (Windows 7 Ultimate) because of a missing boot file. I don't have a CD for Windows 7 Ultimate but I do have one for Windows 7 Professional (64 bit). Would I be able to get to System Repair by booting from the CD? Also, would I loose any data? I foolishly didn't create a Recovery CD or back my data up. It's embarrassing to admit that.