My computer crashed several months ago. I have 2 hard drives so i reinstalled windows 7 on my D drive. I also reverted back to an earlier version of the OS which corrected the problem on the C drive. How can i remove the OS from the D drive now that I don't need it. Whenever I boot up it asked me which OS I want to use. I actually reformatted the D drive but it is still asking me which OS i want to use. How do I correct this problem so it only sees the OS on the C drive. I couldnt find anything in the Bios to correct it. I have a Dell Inspiron 570.