I've successfully installed Windows Technical Preview alongside Yosemite on my MacBook Pro 13" mid 2010, in EFI mode. No BIOS emulation + SSD means boot times are really fast. I installed in EFI mode just to see if it would work. I knew audio wouldn't work, but I did not expect to actually be able to boot windows on this MBP in EFI mode without having to delete problematic drivers (which there were none). So now that I'm here, I'm trying to find a fix. All the solutions I found were geared towards owners of newer Macs. The few 2010 MBP owners on the internet seem not to have found a solution either. In the long shot that someone got things to work but never shared a solution online, is there any?