The thing is.. in the cmd window screenshot he posted.. it DOES see the device to start with.. it asks it to move into emmc flashing mode, then the device disappears and doesn't come back..

From a flasher perspetive, unpluging the deivce AFTER it has been moved (or asked to move) into emmc mode is likely to jump it back out of that mode anyway.. You shouldn't unplug the device between these two steps..

Go back and have a look
First it says:
USB device found at bus bus-0, device address is \\.\libusb.....
NOLO version 1.4.14
Version of 'sw-release': RX-51_2009.....
Booting device into flash mode.

Then it says

Suitable USB device not found, waiting.


So, it never made it into flash mode.. but flasher DID see it.. Unpluging imho would be inadvisable at this point..

I saw someone earlier today with this same problem.. to solve it, we flashed the os image FIRST, then without rebooting or unplugging, we flashed the emmc..

I'm not sure windows is the problem.. it can initially see the phone, but it can't see it after asking it to go into flashing mode.. and an unhappy phone, it seems, doesn't always make it into flashing mode..

flashing the os has, in my experience, solved that problem and the subsequently allowed the emmc to be flashed.