G2 not detected in windows when using flashtool in download mode

Hi, first of all, I don't have my phone bricked, I'm on aosp and I want to test cloudy 3.3; I know I don't need to use a kdz method but as I didn't update official stock lollipop rom, I wan't to make a clean install.

The problem is that using any of the guides (kdz,tot method) I can't go further than entering in download mode, beacuse windows 10 isn't detecting the phone in download mode, I have installed the driver (different versions too) and nothing.. I'm desperate.

Has someone an idea??:confused::confused:

Thanks