Under Options > Audio > Advanced the wrong device is shown at the bottom. Sonar allows me to select the correct device but it won't save the selection. If I Apply and OK, then look again, it's back to the wrong device.
 
Under Options > Audio > Drivers, all the drivers are listed but disabled. How do I fix this mess?
 
Thanks - rev

Hi. Which version of Windows? What kind of Audio Interface?
Have you checked that Windows hasn't changed the internal sounds to use your AI?
If so, try to uncheck and/or change sample rate to the same as SONAR.
Hope it helps.
All the best.