Hello all! This is my first time posting here. I'm hoping somebody out there has some sort of experience with my issue and could lend some insight. I'm quite proud of my Google-fu, but after 40-50 hours of research I've just about hit my wit's end on this problem. tl;dr (too long; didn't read): Moved to a new laptop; Traktor now has horrible latency spikes when talking with my S4 (anywhere between 2ms and 15ms latency). This only occurs when the S4 is connected to the laptop, however. The machine can handle any other task I throw at it, no matter how intensive, without breaking a sweat. I have a feeling, but cannot confirm yet, that it is due to USB 3.0 driver issues - but I don't have any 2.0 ports on my laptop, so I may be stuck. I'm hoping that if I can solve this, I might be able to help assist others with similar issues. Onto the important information: Laptop specs: Asus Rog Strix GL702VSK 12GB DDR4 RAM Intel i7 7700HQ (2.80GHz) GeForce GTX1070 Win10 x64 bit Traktor 2.11.3 17 (currently running at an average of 500us latency, not counting spikes) I have seen many, many topics in the 2012-2017 timeframe on this issue, and have tried most everything that I have come across in an attempt to get this under control. I'll link to various threads related to solution info where possible. What I have tried: Ran LatencyMon (showing 2000-15000µs DPC latency spikes from wdf01000.sys, but that's just a container driver, not the real culprit) Downloaded Windows XPerf (Performace Analyzer) tracing tool (still finding my way around the results of my trace, though it also shows wdf01000.sys as the offender) Updated BIOS to the latest version Disabled UEFI network controller in BIOS Added/deleted/played with HPET (High Precision Event Timers) using bcdedit commands. Disabled unnecessary devices, including: Bluetooth card Wifi card Unused USB devices (webcam, etc.) Onboard sound cards Added "MSISupported" Key to audio card registry Set priority to background processes Disabled disk compression and file indexing Enabled all high performance power settings Disabled USB sleep/suspend options in device manager Disabled battery power saver Disabled Microsoft ACPI Compliant Control Method Battery (not sure if this got fully disabled, but it brought the average down briefly. Did not solve spikes) Re-installed latest Traktor S4 drivers Disabled GTX1070 graphics card from device manager Buying a powered USB 2.0 hub (to trick the system in to using a supported isochronous data stream) ...and more that I have probably forgotten about (but will add if someone happens to jog my memory) What I have yet to attempt: Clean Win10 install Buying a USB-C to USB2.0 cable (I have no data to support this; just a shot in the dark hoping that my USB-C port is connected differently than my other USB ports) Uninstalling/disabling USB 3.0 controller (attempted, but has always reinstalled itself instead of reverting to default 2.0 drivers) As I mentioned before, the fact that this only occurs when the S4 is plugged in leads me to believe that it's a USB driver issue, but I could be entirely wrong. If anyone has any ideas, please toss them around and I'll give it a shot. Update 7/28/2018: Disabling C States in the registry brought the average from 500-900us down to 80-110us, but I have yet to determine whether this solves the spikes. See this thread for details. Basically, just change the registry value in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Intelppm labeled "Start" from a value of 3 to a value of 4. I've logged a couple of very high spikes in the mean time, but haven't actually been in the room to see whether or not they affect audio quality. I'm going to try and play with a program called ThrottleStop 8.60 to see if I can further tune my processors. Thanks!