Excessive CPU activity caused by numerous DPC entries from ACPI.sys
Excessive CPU activity caused by numerous DPC entries from ACPI.sys
Hey there, I've faced this problem before and after formatting my PC, it popped up again. I don't recall the fix, but I think ACPI.sys is causing a lot of DPCs and taking up 30-40% CPU, especially on Core 0. Anyone have any ideas?
Update: In the event viewer I saw a report for Event #37 across all cores.
Also, Event #55 appeared for all cores too.
Using Process Explorer I located the start address of the problematic process — "acpi.sys+0x24fb0".
It seems the issue might be linked to using Virtual HD to access my system image before formatting.
I'm pretty sure the culprit is my external HD.
If I power off the PC and come back, it works.