Hello, thanks for your help. I unplugged all the HTC power and USB cables, downloaded USB Deview and removed all drivers that showed VendorID 28de and OBB4. Then I turned off the computer, unplugged it, plugged it back again (I read somehwere that this fixed it for someone) and turned it back on. I plugged the HTC and run the installer again.
The problem persists: Unknown USB, error code 43.