Midi new computer new interface no sound?

You have given us absolutely no information,,,how can this be solved? 
Please supply more details. 
Tell us how you have it set up and what equipment your using to do this, what soft synth etc.
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It really helps a lot if you post your set up in your signature.  

To add a signature, click on "User Control Panel"  - top right, and then look to the left for "Signature and Comment"

As regards no sound.  Make sure the Windows 10 drivers are installed for the presonus audiobox 1818 interface. 

Then make sure they are selected in sonar (Preferences press (p) and look under Audio | devices and MIDI | devices)

First thing to do is insert a synth Menu item Insert | softsynth.  Make sure your soft synth is routed to one of those enabled audio devices.

Look in the Sonar help and look at "Tutorial 4 - Playing and recording software instruments" - under there you will find a section "Adding an instrument track to your project".  Hopefully that should get you started.

Yes thanx guys, along with customer support i figured it out....i think........Yes i had sound in general, my sound card was working, i had been working in sonar without my midi keyboard for a little while.......customer support suggested i set up my midi track via the new(i think its a new sonar feature?)add track feature.....where i just selected instrument and omni through add track...and i have sound..........i dont know why it didnt work the old way i used to do it........which was simply choosing omni in my output console outs?????