Finally I got it! I went back to STM Bootloader in Device Manager and clicked it to update drivers. Instead of clicking the top window to choose the directory for the driver (I tried that before and Windows said no need to change), I clicked the option below it to "search windows for devices with similar drivers". And guess what popped up! STM Bootloader **AND** STM Device in DFU Mode.
I clicked the DFU Mode one, it loaded and WORKS!!
Thanks to everyone for your help,
Michael
