However, in both cases, the problem is solved: "system" and "system interrupts" return to normal CPU usage. If I uninstall "USB Root Hub", everything under the "USB controller" node disappears except the "eXtensible Host Controller". If I uninstall the "eXtensible Host Controller" via Device Manager, the entire "USB controller" node disappears. I traced back to two drivers: "USB Root Hub (USB 3.0)" (usbhub3.sys) and "Intel(R) USB 3.0 eXtensible Host Controller - 1.0 (Microsoft)" (UsbXhciCompanion.dll and USBXHCI.SYS) Windows performance analyzer shows ACPI issue - screenshot here: WPA - ImgBBĥ. ![]() This doesn't happen on restart - just kicks in at some point and continues until I restart.Ĥ. ![]() Task Manager showed "System" using ~15% CPU and "System interrupts" another ~10%.ģ. Hello, any help with the below would be greatly appreciated.
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