Windows 10: High Latency on only 1 device

Hello, for the last couple of days i have been unable to play any games that rely on internet connection based on the quality on my experience playing them. I have done multiple different speed-tests and i found my speed slowly going up to its normally levels then jumping back down to around 30-40% of its normal speed. this speed isnt the problem however, as this causes my ping to go from a solid 30-50 to above 1000 every few seconds. The process what happens is:1 The Wi-Fi is solid for about 1-3 seconds2 the speed freezes for about 2-4 seconds3 the speed plummets to around 30% of normal sp

:)

 

High Latency

I'm having an issue with high latency. After a reboot the computer runs fine....but over time the latency continues to increase so eventually everything starts to respond so slow that it is unusable and have to do a hard restart. I haven't been able to
figure it out. I bought an external network card to use instead of the onboard one hoping that would fix it....but same results. Anyone have any ideas??

 

Windows 10: High DPC latency (ndis.sys)

Recently, my audio has been crackling and popping and glitching, and I wanted to see what the fuss was all about. I tried everything. Until I found out that my DPC latency was dangerously high. I ran it through the DPC Latency Checker and LatencyMon, and
apparently the problem was "ndis.sys". I've literally tried EVERYTHING. Here's a list of what I've done to resolve this problem:

• Updating drivers
• Changing the power plan
• Disabling the dynamic ticking
• Updating the graphics cards drivers
• Disabling Firewall
• Disabling IPv6
• Uninstalling Bonjour
• Disabling Energy Efficient Ethernet
• Disabling/re-enabling drivers
• Adding PerfLevelSrc, PowerMizerEnable, PowermizerLevel, and PowermizerLevelAC values to Registry Editor
• Uninstalling antivirus software
• Modifying the "Start" value in the Registry Editor's value to 4

UPDATE: Recently, the DPC latency has declined, which is good, however it still sometimes has latency-spikes and I still don't have proper DPC latency.

COMPUTER SPECS:

OS: Windows 10 Home version 1909

Computer Model: Dell Inspiron 3668

Processor: Intel(R) Core(TM) i3-7100 CPU @3.90 GhZ 3.91 GhZ

RAM: 8 GB

Graphics Driver: Intel(R) HD Graphics 630

Audio Driver: Realtek High Definition Audio

DPC latency (updated):

 

High DPC latency

I use my Dell XPS for recording and live playback but the system suffers from high DPC latency caused by ACPI driver.

I removed Dell audio drivers and installed those from RealTek with no avail. Latency is an issue because I need this computer for live recording. Please your advice.