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salut, oui

c'est à cause des pilotes non signé qui sont bloqués sur win7.

une petite recherche google et vous trouverez des tutos

au passage, nouvel update et nouveau driver sur le site de korg

V1.11

http://www.korg.com/us/support/download/product/0/544/

pareil, problème sur win 7 64bits, aucun avec 32bits !

ça ne vient pas forcemment de win10 ! pour une fois

les drivers korg pour windows sont pourris....essaye ça :

Don't use the old drivers. Uninstall the old ones. Download the newest one.

Install the driver software. Do not run the "Install KORG USB-MIDI Device" application.

Run the "Uninstall KORG USB-MIDI Device" application. Yes, it's confusing, I know, but follow along and do it anyways. Hit the Next button. It will show a list of MIDI drivers that are installed from midi0 through midi9. Many of them will be grayed out. Press the "Option..." button. Uncheck the checkbox for "Delete KORG MIDI device only" then press the OK button.

Now all the midi locations with an active driver will be enabled so that you can check them. You need to remove at least two of them, preferably consecutive ones. Might as well remove any that you aren't planning to use at the same tome. Check them. Hit the Next button and proceed to remove them.

Close the app. Reload the same app just to confirm that two spaces are available then close it again.

Now you can run the "Install KORG USB-MIDI Device" application to install the two midi ports require for the R3.

Then run the "Configure KORG USB-MIDI Driver" app. The "Devices..." button should be enabled. Press the button. The two R3 midi ports should be displayed.

It should work now.

You can run the "Configure KORG Driver Setup Utility" to have the driver automatically load when starting.

What causes this? The driver can only use two of software midi ports from midi0-9. Sometimes these can all be taken up by old drivers. Korg doesn't remove them automatically. So they have to be removed this way first.