Analogue output on MC6000

I Have a mc6000 mk2 and the main computer is using ch 2/3 i have a second sound card with another computer using ch 1/4 for backup main computer is windows 10 running virtual dj v8 the backup is running v7 windows 7 I have had issues with virtual 8 freezing hence the backup pc and sound card Im just wondering why the controller freezes and the backup sound card cannot be heard is their a way to allow a stand alone output from the mixer hope this explains ??? thanks