Windows 10 DPC Latency problems

[lurrell]

I built the Windows machine that I currently use daily about 4 years ago. For the past 10 months I have been struggling with DPC latency issues in most of my software (Chrome, FL Studio, Steam Games, etc.) which causes audio glitches and stutters games and programs momentarily. The current steps I have taken towards fixing this are as follows:

• Updated BIOS to the most recent version.
• Updated all of my drivers through Driver Easy
• Messed around with my audio settings (Enhancements and such)
• Erased all of my user settings and data on C:// (But didn't wipe and re-install Windows)
• Formatted my hard drive

I've been stuck with this problem for so long and I've reached a point where I'm a little lost on what to do. Any help would be greatly appreciated.

Specs:

• Windows 10 x64 Version 10.0.18363
• Intel i5 - 6500 CPU @ 3.4GHz (quad core)
• ASRock H170A-X1/3.1
• NVIDIA GeForce GTX 970

Below is also a screencap of LatencyMon after running for around 7 minutes.

 

[lurrell]

Forgot to add these obviously important additions.

Speccy snapshot:
http://speccy.piriform.com/results/nHwM7USApHNYOtnV8u4NqxH


Google Drive link to my diagnostics (trace, Diag, msinfo):
lurrell's PC diagnostics.zip

 

[xilolee]

Hi!

Did you update the bios in windows?
If yes, re-try with instant flash - method two (don't use the method one): ASRock - BIOS Upgrade Instruction Guide

Run chkdsk from an elevated command prompt for each one of your drives.

Then try this:
1) Find your pci string in "Device manager, Sound, Video and game controllers", "High Definition Audio Device", properties, details tab, Property: Parent, Value: Your-PCIString

Spoiler

2) Open regedit and "navigate" here: Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\PCI\Your-PCIString\Device Parameters\Interrupt Management\MessageSignaledInterruptProperties
3) Change the MSISupported value, from 0 to 1. If it doesn't exist, create a new dword (32-bit value), name it MSISupported, give it 1 as value.

Spoiler