I have a dell inspiron 3421 with windows 10 enterprise, fresh install.
With no programs running, I get 40% cpu usage from “System” and “Interrupts” combined.
Searching the problem I downloaded the Windows Performance Recorder and the Windows Performance Analyzer. In the “DPC and ISR Usage by Module, Stack” tab you can see that hal.dll itself is using more than 10% cpu at all times.
As far as I know it is all Windows’ stuff, not 3rd party.
All the drivers are up to date. I’m not sure what to do next.
Link to Windows Performance file (.etl)https://drive.google.com/file/d/0B29xKdkT5wYzYXRYTncyR2JURmc/view?usp=sharing
Solution:
The Dell Inspiron 3421 comes with a DVD drive. You have replaced it with a HDD caddy to also install a Samsung SSD 850 EVO 250GB next to your old Seagate Samsung Spinpoint M8 1TB.
You have to look if your caddy has a jumper and if yes, change the position of the jumper.
