I pulled my hard drive out of my computer & put it into a friend's computer to copy some files from mine to his. When I booted his computer, my hard drive did not show up as drive "D" like usual, so I right-clicked on "My Computer" & selected "Manage." When I clicked on "Disk Management" an "Initialize Disk Wizard" popped up, so I clicked next several times, thinking it would get my hard drive to work, but it didn't. My drive showed up as "Unallocated." Well, after realizing I forgot to set the my jumper from master to slave, I turned off his computer & put my hard drive back into my computer and attempted to boot windows. It now says "Disk Boot Failure"!!! What did I do & how do I fix it so I can boot my computer or at least get it to where I can copy my important files off of it?