This is not a duplicate of Windows 7 won't show SATA Hard Drive in My Computer
I connected a second 1TB WD SATA hard drive to my machine. The hard drive still has remnants of an Ubuntu installation which was probably had ext3 or ext4 file system. The 1TB drive is shown below as the first and second entries. The drive is otherwise inaccessible. When right-clicking, the option to assign a drive letter is disabled. The only option available is to Delete Volume. How do you make this second drive accessible from Windows? Does the volume need to be deleted?