Bootloader update failing

[Eric Beam]

Hello,
I picked up a 2nd OG Midronome on the used market. Using the "Upgrade Midronome Bootloader Step 1.exe" updater, it stops and displays "5" when trying to update to the "upgrade-bootloader-v99.9.midr" bootloader. It looks like the original owner never updated this box, so I need to update the bootloader before I can update to the current firmware.
Same result on 2 different computers. I'm a bit stuck at this point.

[Eric Beam]

Well 3rd computer did the trick. I have a suspicion it might be related to the new Windows MIDI updates that are in the works. I keep the 3rd system offline and compared the usb device drivers after the successful bootloader update.

3rd system driver.

Main system driver