I hope those are not defects, I mean, what sense have that those Sp3 some are good some defected? defected for what? I think that here is how they run this windows 8.1 ... and Sp3 has some its own bug, and they try to fix.
For example today the user KIF said that even his keyboard is giving issue since 2/3 days... like me, this means that Microsoft did some fix with some update and wasted something else... if we continue like this we get crazy soon, better they don't fix 100 times per years, but 1/2 updates and they need to test first, not let us test and get more troubles. We will understand only in the next weeks what is going on here.
I ready that other thread, but they speak there of system interrupts also. I got this issue when I used the Docking, with the docking I had also system interrupts to go up with system.... I read in this forum or other about the docking giving this issue, I removed it, and disapperead the issue with system interrupts, because the docking is defective... because don't work well with the mini displayport it has, I decided to sell and don't fix that system interrupts for an hardware that I couldn't use.
So I remain now on my Sp3 connected to a LG 30 inch via dual-d active adapter.
And I have only this SYSTEM process that goes up to 35% as I leave the pc 2/3 minutes idle.
Some day ago was perfect the pc and not doing it anymore! I would that again Microsoft this something to Logitech drivers or devices and now this is causing again the issue I was able to solve installing the Logitech Setpoint utility.
I'm working for Microsoft!!!!!
I have to leave you now 30 minutes, I just cleaned pc even with netgate, and now I need to leave idle pc for 5 minutes, for 3/4 times and to see how it is now. But I doubt... the issue is much more complicated. I think I will go to check with KIF, Logitech forum what has to say, are many users with K810 keyboard and windows 8.1 pro