MY HP OMEN faces high CPU usage on idle and the entire system lags and freezes - Laptops and Pre-Built Systems - Linus Tech Tips
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![High "System interrupt" CPU % in Windows 10 Task manager, linked to ACPI.sys, if and only if a serial port device is connected - Super User High "System interrupt" CPU % in Windows 10 Task manager, linked to ACPI.sys, if and only if a serial port device is connected - Super User](https://i.stack.imgur.com/0iwn0m.jpg)