I have the Kronos USB Midi driver installed...since I can't find a usb audio driver I assume this is both audio and midi.
I see 2 Kronos devices in device manager
KORG KRONOS which has a Korg driver for midi
KRONOS which has a Microsoft driver for usb audio (is this the problem)?
If I right click on my speaker icon in the taskbar, select recording devices I see 'Line KRONOS' ready, then I click properties/listen to this device and I can hear it in windows.
For some reason it does no appear in SONAR, I'll try making the Kronos the default device and report back, thanks.