Hi all! Trying to install Windows 7 for the first time on my older 13" MacBook Pro (Late 2011). The machine doesn't have an internal DVD drive anymore; using a USB drive. On boot to install windows, the drive is accessing for a little bit but the screen only sits at a black screen with a blinking white cursor. I've read a bit that this may be a missing driver issue, but I've not been able to do anything to solve that yet. Does anyone have any thoughts? The Mac side is running Yosemite if that make a difference. Thanks!