USB power management?....In device manager /system/ usb hub at the very bottom of the device listing...open it, and check all usb hubs and ports/pages to see if windows turns off usb ports and or hubs...you want to uncheck that box on all usb ports, unless you know which port is which port..of course...so you can set that as do not allow windows to turn off that port...or ports is vital to stop a laptop from conserving Power sent over usb.
I am sure you may have done this, but some times things get reset by updates....
Not saying it is the cause, but surely can make noise if being done, and or cause loss of driver...eh?
And in the Sonar Pref, doing the asio switch thingy....Did you apply or hit ok when changing up the asio to other, and then back again?...you have to hit the ok button on each change.
Just saying, it worked here as a work around...not all have the same issues...And, I hate troubleshooting...so I can understand the frustration caused by these little oddities, no one else has...or has witnesses except some have..and the work arounds come by fluke.
also check the default sound device for the system..and deselect, and reselect...also, I found in some cases, opening the sound icon on the task bar and reselecting, if internet was used...So, something in that being buggy with browsers tied or ties...Perhaps...But no links to anyone saying...and as the system I witnessed this on, was buggy..or corrupted, it might be moot to say...anything...But, perhaps mention is, a assumed issue...let us say.?
If sought solutions are said or to try...try, and if not, note it down ...so other can gain from your understanding of what works for...your kind of setup.
And share the good will....I think the EARTH...needs a bit of help...and more joy, less mind control and frustration...
Sometimes thinking out side the box, helps what does not work inside the box.
Best of the days to you.
keep the laptop plugged into the wall wart...