One core 100% load with Interrupts but no process

imuser

Reputable
Aug 17, 2014
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What is causing my 1st CPU core always to be at 100% load and showing no process in task manager?

It's notebook ASUS X53SC
i5-2430M 2.4GHz
nVidia GeForce 520MX
4GB RAM
Win8 Pro 64bit clean install, all original drivers.
Same issue on Windows 8 32bit.