System & System interrupts using too much CPU

Bernel

Reputable
Feb 12, 2015
2
0
4,510
Old problem from many threads, but none of the answers seems to fit my symptoms.

Computer: ASUS Z97-P motherboard, i5-4690K processor, 8 GB memory, GTX 750 Ti graphics card. No strange hardware attached, no third party firewall or virus protection.

System takes up ~24% CPU, System interrupts ~12% and csrss ~6%. The numbers fluctuate a bit but total load is around 40% when I do nothing.

The odd thing is that this doesn't happen every time. Most of the times when I boot the boot is fairly slow and I get this problem, but perhaps one time in four the computer starts faster and CPU use drop to 0 as it should. It seems to work properly somewhat more often in the evenings.

Looking at the widows log I get several reports that the computer wasn't shut down properly (event id 41). I also get the infamous "The driver \Driver\WUDFRd failed to load for the device ACPI\PNP0A0A\2&daba3ff&2." which seems common with ASUS Mb:s but I don't know if it has any bearing on my problem.

I tried reinstalling Windows and the problem persisted, I've turned off sound effects as someone suggested in another thread, I've tried a clean boot with as much turned off as I possibly could. I've tested the hd, run the windows diagnostics I've been able to find. Does anyone recognize the problem or have a suggestion?
 

Bernel

Reputable
Feb 12, 2015
2
0
4,510
Tried troubleshooter, and since the problem remained after a reinstall of windows I doubt it is a virus that has sneaked past detection. My guess is that there is some error in how the computer starts up leaving tasks running, possible caused by a problem in shutting down before, I'm just not good enough at decoding all the processes and stuff running in Windows to figure out what. When I started with computers an OS was like 10K and possible to understand in detail, now I've long since given up and just want to use the machine.