So I recently installed Windows 8 on a MacBook Pro 2011 in UEFI, not BIOS emulation. It installed fine on a seperate partition. But, I had driver problems, so I ended up booting back into the mac partition and removing windows. Once I removed the Windows partition, every time I hold down the option key, it still shows 'EFI Boot', even though the Windows 8 EFI partition is gone. When you select it, it comes up with a win 8 recovery thing, which just tells you a code. How can I remove this please?