I created a separate partition, wanting to install a clean, dual-bootable Windows 10 on it, keeping the existing version of Windows 7. However, the installer went ahead and replaced Windows 7, and since there were some problems with sound in 10, I decided to revert back to 7, which went flawlessly (kudos to Microsoft on this one!) On installation I didn't see any choice as to where to put Windows 10, and it's looking like I can't do it the way I want. So, I have two questions: 1) Will Microsoft allow me to do another free install, and 2) can I get it to install cleanly on the partition I have created for it?