In the attached picture, Disk 0 is divided into "Primary partition" (19GB), C (116GB), D (329GB). D has all of my data, C contains the Windows OS.
(1) I do not understand the 19GB Primary partition. Could someone give me an explanation of that partition?
(2) When I execute a clean install Windows 7, I will be asked if I want to delete partitions. I will choose to explicitly delete both C & D. Do I also explicitly delete the 19Gb Primary partition or will that be done automatically when I delete C and execute a clean install of the OS?