Issues with Quad-Capture/Looking for a new interface

Some USB 3 ports are backward compatible, and some are not.
 
I looked at the specs for the computer and it looks like it has 2 super speed USB 3 ports and another USB 3 port, with apparently one set or the other seeming to be backward compatible.
 
Please note that backward compatible may be a sliding scale, from manufacturer to manufacturer, and while it might work for you, it also might not.
 
Certainly trying the other USB ports is worth a shot.  You may need to install the drivers for the interface again when you shift to a different port - I would actually recommend you first remove the audio interface drivers, then go through installation using one of the other ports.  if successful, you are done, and if not, then again remove the drivers and install them yet again for the 3rd port.  This approach should provide maximum potential for success.
 
I am also wondering if you can try one additional thing, if you haven't already - and I think this should be tried prior to doing audio interface driver removal/installation as explained above.
 
So - what I am asking you to try is to either turn off the laptop's Wi-Fi (there might be a physical little switch on the chassis somewhere, or perhaps a function key for it), or if not finding either a switch or function key, go into Windows Device Manager just prior to launching a Sonar session, then find and expand the Wi-Fi drivers and disable them.  (note that is disable, NOT uninstall or remove).  THEN, launch Sonar and see if you get a more stable system, as well as better audio streaming performance in Sonar.  After completing your Sonar session and closing Sonar, you can then turn on or enable the Wi-Fi again and you should get instant access to the web again.
 
The reason I mention messing with the Wi-Fi is that for MANY MANY folks, they have all kinds of sound and stability issues when running Sonar on a laptop that has Wi-Fi (which they all do).  Turning Wi-Fi off or disabling it, then running Sonar, then turning on/enabling after finishing the Sonar session seems to fix all of those issues for lots and lots of folks.
 
I look forward to you testing out that which I have put forth here, and thank you for trying the other things folks had suggested.
 
The Wi-Fi testing should be pretty quick, and may hopefully fix things up for you, or at the very least should give you better audio streaming stability.
 
Bob Bone