I wish that we could say it's going to work without flaws on every computer, but the truth is that every computer is different, even two identical models with the same hardware configuration, due to the software they're running. I've been working in IT for over 25 years and the fact that Windows is able to run on such a wide variety of hardware configurations is simply outstanding (so kudos to Microsoft).
We can't take all the blame when an update to software or a driver, or simply the installation of another application, causes rekordbox to perform sub-optimally, as we can't control those variables.
The best thing we can do is to provide support and troubleshoot the potential causes, and direct you to disable or remove any unnecessary software / services / hardware which may be interfering, change settings where applicable, or in some cases, recommend using a different computer altogether.
I will recommend you please file an inquiry ticket here as that will allow our support team to gather detailed information and communicate with the rekordbox team to try and determine the cause of your audio issues.