No as you see you already have it, it's part of Windows, but interestingly if you read up on the topic of windows audio drivers you'll find the WDM/ KS is from the day's of XP and it has been upgraded to WASIPA. The KS stands for Kernal streaming and apparently that is no longer used either.
According to Microsoft , their drivers should work with all audio in and out devices but that seems to be untrue judging by the 100's of people who try and use DAW`software and have issues when trying to use them.
Some interfaces seem to allow the WASIPA option as a driver choice but I know I don't have that option. One person just posted in the X forum and said that things got worse when they used WASIPA.
Cakewalk themselves in their documentation talk about how you should try the different drivers and see which ones work, but they're not really owning up to the fact that Sonar is sometimes the pickiest software when it comes to drivers. In other words, you'll often see a post where they say "It seems to work fine with all my other audio software but not with Sonar"
And to make life even more interesting , you seem to get different issues with different computer configurations.
Just go buy an audio interface that everyone say's is working on the same system you have, best bet. Otherwise your bashing your head, causing stress and not having much fun.
Go sell the US 125M to someone with a MAC using Cubase or Logic. It will probably work perfectly fine for them.