Hi everyone! I have a mid-2009 15 macbook pro (2.66ghz, 4gb ram). I just upgraded to Yosemite and now Im having tons of trouble installing windows 7 via bootcamp. I used bootcamp to create the partition, everything loaded up and when I get to the windows installation screen (I choose my location and language) then I get this error: A required CD/DVD drive device driver is missing. If you have a driver floppy disk, CD, DVD, or USB flash drive, please insert it now. I know this shouldnt be happening but I inserted my driver flash drive but none of the drivers are correct, and I cant even install windows or get past this page. I read that maybe my ISO was corrupt, so I burned another copy (tried burning at lower speeds, using a PC, I made 6 different versions of the ISO and none work). Same problem. I burned a copy of the official windows trial ISO, still same issue. I tried booting by pressing F8 and disabling signature drivers, but still have the same issue. So then I tried creating a bootable USB. I know my mac wont boot from USB but I created the bootable USB using the windows 7 usb tool, I go to boot (I press C after the startup chime) but all I get is a black screen with blinking white underscore, and nothing ever loads. Then I tried hacking bootcamp via editing the info.plist and using terminal, I create a USB via bootcamp, but then I never even get to the black screen to load windows. Now Im completely lost and not sure where to go from here. Does anybody have any suggestions on what I should do or what my options are? Will windows 8 work on my machine? Any solutions? Thank you!!