Windows 10: High Idle CPU Usage System Interrupts

I know EVERYONE asks "wait, what is this process, how come I'm idling with high CPU usage?!" but I have exhausted all internet solutions I can find here, and I work in IT.

My server at home is an old Lenovo E32 with an i5 4590S, 12GB of DDR3 1600, an EVGA 500W G3 PSU, a GTX 1060 and a decent bit o storage crammed in (2x3tb drives, 1x8TB drive, a 256GB boot SSD and a 1TB game storage SSD.

It functions as a remote fileserver, Parsec game streaming PC, Plex server and Minecraft server.

Yet lately when I remote in I have noticed that my overall CPU usage is sitting at about 30%, yet I am doing nothing on the system. I know the 4590S isn't that fast, but I don't know what is going on. The only process consuming any CPU usage is System Interrupts, sitting pretty at about 22%. I ran a recommended latency testing tool and it seems like DirectX is the thing causing all the interrupts. Is this normal? I have never seen idle CPU usage like this out of a healthy system under no load.

Thanks!
Rowan

:)

 

High CPU usage when idle - System and System interrupts

I've been trying to find a solution for a while and decided to ask here for more help. I've noticed that my CPU usage is pretty high when idle, even after a cold reboot of the computer:

Task Manager View showing "System" and "System interrupts" causing a high CPU load:




I've tried to dig deeper and used Processor Explorer to get more information, which, strangely enough, shows that "System interrupts" uses up more % of the CPU than the "System" process:

Process Explorer showing that "Interrupts" is taking up 20% of the CPU load:




Next I've tried to narrow down the causes of the interrupts by using the Windows Performance Recorder and analyze the graph using the Windows Performance Analyzer (can't post the screenshot due to not having enough rep, but it looks like hal.dll is causing the most interrupts, but less than the 20% seen with Process Explorer)

Any suggestions how to proceed?

Information about my computer:

• Windows 10
  
• Intel Core i5-4790k
  
• AMD R390 GPU
  
• 8 GB Ram
  

I've updated the GPU and sound drivers and Windows is up to date.

 

High CPU usage by "System interrupts"

I have DELL INSPIRON 15 5570 i7 8th generation, OS is installed in 128GB SSD drive. My CPU usage is very high. I opened task manager to see which process is using more CPU and found that " System interrupts" is using more that 80% of my CPU , thus slowing
the system. I have windows 10 1903 installed with all latest drivers. Most of the program and apps opens slowly because of all of my CPU is used my system interrupts. What should I do to fox this problem?

 

High CPU usage with 'system interupts'

High CPU usage with 'system interrupts'. However, the usage decreases when the task manager is opened. On opening the task manager, the system interrupt is visible for a few seconds and then the CPU usage goes down.