Windows 10: W10 getting slower/lagging more (wondering if its somthing I've done)

No problems for three days, then suddenly, the computer locks up for a few seconds and then starts flickering. Photoshop keep "redrawing" over and over at about five second intervals.

This all happened at just the moment when I went on line to check a passport photo on the NZ passport office website. I go to task manager, and sure enough, System Interrupts is running at between 40% and 60%, topping the CPU out at 100%

I am now even more suspicious that this is a network related issue..

 

Hi, see
How to get the cause of high CPU usage by DPC / Interrupt - Windows Tips Tweaks - MSFN
for a way to diagnose system interrupts.

The key is to identify which driver or drivers may be involved.
Note- Process Hacker does not seem to be fully Win 10 compatible.

 

OK, so I have tried all the things you have recommended. The most useful suggestion was to use Windows Performance Tools Kit. and after several attempts, I have come to the conclusion that there are two drivers responsible for causing my problems with System Interrupts driving the CPU to maximum

ndis.sys
tcpip.sys

Most of the time it seems to be ndis.sys, but occasionally, it shows tcpip.sys as being the cuprit... ratio is about 8 to 1

Any ideas about how I fix this now?

I have had some people recommend that I try to find older outdated drivers for my Network Adaptor, but surely that would mean that the current drivers are not compatible with Win 10, so why would the older drivers be any better.

Also, where did the ndis.sys and tcpip.sys drivers currently installed come from? Were they included in my Win 10 install or where they loaded from the chip-set disk that came with the computer originally? How can I find that out?

 

I thought was time to update this thread.

I was never able to get to the bottom of this issue. The problems just kept getting worse and worse, with both tcpip.sys and ndis.sys showing high latency within 30 minutes of rebooting.

I installed Speedfan and found that the the CPU was normally running at about 50°C, but when the tcpip.sys and ndis.sys latency started to climb, System Interrupts would climb to over 60% on the CPU, and the CPU use climbed to 99%. You could hear the CPU fan wind up like a jet engine, and the temperature would climb to over 75°C. At this point the computer was unusable.

I gave up on it and replaced the MB with a brand new ASUS B150-M/A2 within an Intel i5 core CPU and a 4GB DDR4 Ram stick

Solved!