System and System Interrupts- high cpu ut…

System and System Interrupts- high cpu utilization

Hi,
I have got a problem with my recent windows 8.1 installation.
Immediatly after instalation two tasks has high CPU usage: "System interrupts" and "System".

I've installed Windows on macs many times and it is the first time i have this problem.

I've tried updating Windows, updating drivers, reinstalling a whole bootcamp package from Apple website- it doesn't work.

Same thing occured on Windows 7.

Maybe it is important that I've used developer preview of Yosemite (which updates EFI), and then I've reinstalled Mac to Mavericks.
Hardware: Macbook Pro Retina 13" Late 2013 / i5 / 8G

MacBook Pro (Retina, 13-inch, Late 2013), Windows 8, 8.1 update 1

Posted on Oct 15, 2014 6:32 AM

Mar 29, 2016 12:23 AM in response to gglas

No joy. I used to have a stable rMBP (late 2013, Iris Pro, Core I7 4960HQ, no dGPU) running Windows 7. Then SSD S.M.A.R.T. diagnostics said "fail soon". Now back from a Genius Bar SSD swap, it was time to upgrade to OS X El Cap and to a new Boot Camp install with Windows 10 Pro.

What brings me here is of course I have the same problem as all you nice people. Interrupts and one CPU pegged at idle. Problem goes away temporarily if I sleep/wake the machine.

Gglas, I already have the same Intel graphics driver version as you, 20.19.15.4331, although it was installed during Boot Camp driver install during first boot, and unfortunately it has the same hot battery killing interrupts problems reported by so many others here.

Well, I guess I will have to live with it or give up on Windows on Macs. I have seen Apple never fix far worse things that bit lots of people (such as the outrageous OS X Lion? upgrade bug that silently installs a recovery partition, overwriting the first 650 MBs of one's Boot Camp partition) so I am not optimistic Apple will spend any cycles fixing this latest lamentable problem.

Despite the beautiful screens, I'm coming to think Boot Camp is just not worth the hassle and non-support any more -- time to return to the Matte Black ThinkPad world -- or perhaps to a Surface Book.