this happened with 1.5.15, too. Spybot would take several seconds trying to access the floppy drive, while i heard that loud sort of grinding sound.
i installed 1.5.2rc1 on top of it, and had other problems. so i uninstalled that and just fresh-installed 1.5.2RC1.
still the floppy thing. is this normal or not? it's bothersome since there is no disk in the drive.
thanks.