Vista - Why do I have 2 floppy drives showing?

I have a system running 32-bit Home Premium and noticed that when I open "My Computer" it shows two floppy drives - A: and B: - even though my system only has one floppy drive (and there's only one showing in BIOS setup). I tried uninstalling drive B:, but the next time I booted, it was reinstalled. I then tried uninstalling both floppies -- when I rebooted, the system promptly reinstalled A: and B:.
Any suggestions on how to correct this? It's not a critical problem, since I have only used my floppy to boot hard drive diagnostics, but it is becoming a major irritant.
Tom Filipi

OMG! You found B:!!! Nobody has seen B in 2 decades.

Seriously, I'm not sure how to help? B is a legacy thing that was before my time. Were you tooling around in the bios recently?

His computer is having flashbacks from 15 yrs ago....If I remember correctly, the A and B assignments were determined by the floppy cable.

I haven't touched the BIOS since I performed a flash update that was recommended by the mainboard mfr (microstar) to correct some original Vista problems. I haven't been paying attention to the floppy part of the drive list, so I'm unsure when the B: drive first appeared - for all I know, it could have been there since my original upgrade from Win2K, (which was an absolute horror - I must have spent a week on the phone with Vista support before it was working properly.) In any case, it's comforting (I think) that I'm not the only one who is mystified!
PS: I notice that this Forum on drivers has the subheading "Vista x64 Driver help & discussion" Does this mean I shouldn't have posted my 32-bit query here? If so, my apologies, and please direct me to the correct venue.
Tom Filipi

it is due to your bios update. same thing (kinda) happened to me when i flashed my bios. when you flashed your bios, you loaded a bios that has defaults settings applied. after the flash i performed, i had to go back into the bios and reset all of the settings to where i had them set before the flash. why yours chose to show the b floppy is unclear, but you will have to go into bios to set the drive as not used.

Unfortunately, my BIOS doesn't show a second floppy drive. I notice this subject was also discussed in another thread, now closed - How many floppy disk drives do you have?. It doesn't appear that the problem has ever been resolved. Strangely enough, my second, "B:" drive appears with an icon that looks like the old 5-1/2 inch floppy! Do they even make these any more?