I bought an SSD, and hooked it with my old hdd to my system. There was a Mac and Win partition in my older drive. I erased system files, but couldn't formatted it because it has important info. Now at startup (the screen comes after pressing alt button at startup), i managed to erase second Mac option and second Recovery option, but there is still a second Windows option, which linked to nothing. My question is, how can i delete that obsolete option at startup? Is there anyway i can manually arrange that screen?