It seems I've screwed something up once more. I installed Bootcamp on my Retina MBP, and it was working fine, but I realized I needed more space than I originally allotted it. So I went into disk utility in OS X and shrank my Mac partition by 40 GB. Then I rebooted into Windows and went into its disk utility. The option to expand the Windows partition into the new space was grayed out, so instead I just formatted the new 40 GB into NTFS. Then I restarted my Mac and all heck broke loose. It brings me to the screen where you can select which OS to boot into. Normally this screen has three options: OS X, Windows, and Recovery. This time it only showed "Windows". So I selected Windows, but it shows a blue error screen with a frown emoticon and restarts immediately. And this is where I'm stuck. I've tried resetting PRAM and NVRAM with Option + Cmd + P + R, but apparently the "bootloader" isn't the problem. On a PC I could probably fix all this, but I'm still new to Mac computers, so I have no clue what to do. I do have an external USB drive, so if there's something I could download and boot into it to repair everything, that'd be great. Thanks!