Your graphics controller does not support Windows® 10, check the following for more information Supported Operating Systems for Graphics Drivers and Supported Operating Systems for Boards and Kits. I understand your situation and would I encourage the community to collaborate with previous experiences in regard to this matter.
Thanks for your email.
I'm using an external video card.
Is the graphics controller somehow related to wake timers?
Not really, wake timers are related to the BIOS not to the Intel Graphics.
Please bear in mind that whenever you add a graphics card to the motherboard it will disable the Intel graphics.