I would turn it on and within 2 minutes it would crash the NiHostIntegrationAgent.

The weird thing is haven't had the hardware connected for months so I had ruled that out, but it seems there may be a conflict between Komplete Kontrol s49 mk2 and sharing the resource of NiHostIntegrationAgent with Maschine 2 application software on Windows 11?!! I hadn't been able to get the s49 working since I uninstalled the registry editor, until I uninstalled Maschine 2. So just as a test, I've uninstalled the Maschine 2 software (just the application) and viola! My keyboard has been working for 2 days straight without crashing NiHostIntegrationAgent! As I went back through my memories of the months that I've been having this issue and all the things that I've tried, I thought, hang on this didn't start until I had Maschine Mk2 connected to my setup (not long after I had purchased and taught my self how to use the s49 Mk2). Just an update: I tried something from leftfield. I'm so frustrated at this point that it is totally interfering with my ability to produce any music. I've tried different cables and plugged it straight into my device but to no avail. I've tried everything that is on the Native Instrument Knowledge base, tried everything that the help guys told me to do and have even reinstalled my entire operating system (took 3 days to reinstall all of my software. It happens in both Ableton and the stand alone Komplete Kontrol software. Then I'm back to it may work for a day/hour. The only way I can get it to work is to use the Native Instruments uninstall reg tool to uninstall NIHostIntegrationAgent, then reinstall Komplete Kontrol software, then run a registry cleaner and restart. If I turn the keyboard off and on, it then gets stuck on the loading screen.

I can still play whatever instrument I was in when it froze on, but can no longer use any of the controls or knobs.

Sometimes the s49 works all day and other times it works for a couple of minutes before freezing.

The problem is totally random occurrences of the NIHostIntegrationAgent crashing. I then upgraded to Windows 11 Home edition and now my s49 only works intermittently. At first I was using Windows 10 and didn't have any issues. About 6-7 months ago I purchased the Komplete Kontrol s49 mk2 keyboard.

Native instruments s49 mk2