Hi
Here is my Config
Intel NUC DE3815TYBE
BIOS 0032
Crucial 8GB RAM
Samsung 840 SSD 120GB
Windows 8.1 Pro 64bits, booting UEFI, updated
July 2014 Driver Bundle for Windows 8.1 x64
Every time I power up the Nuc, windows will show 99% cpu usage on system Interrupts, system will be very very slow.
The problem also happens when I shutdown windows and power up it again.
When I reboot the problems disappears.
Cause of this strange behavior I suspected that Windows 8.1 fast startup (hybrid boot) was causing it so I disabled it.
I guess there is a bug somewhere in the bios or in the intel drivers, cause fast startup works fine in many PCs I have installed with same version of Windows but not here.
Please help me fix the problem before people will blame the CPU for the slowness of windows 8.1 on this nuc.