Have tried to change your computer hard disk drive letter? Here in this post I will show an easy method to change hard disk drive letter in windows7. may be you know or may be not hard disk drive letter A and letter B already reserved for floppy disk. If you are not using any floppy drive in your system then you can assign Letter A and letter B to your other hard disk drive. You can set any letter for your hard disk drive as you want. Its very simple in windows7.