As you can see in the attached image, I have assigned letters A, B, C, and I. I would like to assign the letter D to the partition labeled "Backup" but letter D and E are missing from the drop-down list. The "Add Drive Letter or Path" dialog box only shows letter F through Z (not including the letter I).
I recently installed Fedora on that very partition. I later formatted/deleted that partition (and OS) from within Windows 7 Disk Management Dialog box and created the new volume for use within Windows. It allows me to assign a letter; just not D or E.
I'm sure that it would return to normal if I formatted and reinstalled Windows 7, but it is a very tiring process reinstalling and configuring all of my programs. Does anyone know how to fix this??
My mistake. I thought it had something to do with me deleting Linux, but no. It was PowerISO. I had PowerISO enabled with 2 virtual drives; they used letters D and E.