You still can install V2 (2.3.1 to be exact), but there's a trick.
When during the installation you're asked to Ignore, Retry or Cancel something related to nVidia drivers, just ignore and finish the installation. As a result it won't recognize your Leap Motion, BUT...
1- Go to C:\Program Files (x86)\Leap Motion\Core Services\Drivers
2- Double click on dpinst64.exe or dpinst.exe depending on your OS (x64 o x86)
That would install the files you're missing and should start (green) your Leap Motion