Hi,
On Windows 8.1 and on Windows 10 the same issue appeared:
Coming back from sleep mode the keyboard/touch pad/usb stopped working.
After a recovery, it worked again for a while, but then stopped again.
Today I Installed a fresh Windows 10, installed all the drivers, a new BIOS and it worked for a short time. (I even tried to close and open the lid, restarting, etc. it worked!!!) but when it went to sleep, it stopped working again, and I can't make it come back.
I noticed in the Device Manager when I re-connect the keyboard it reappears as an unknown USB device: it must be the keyboard, and this definitely show that this must be a driver error. I tried to update it, but no luck.
Also, I reinstalled the "Platform_Driver _Intel", but that also didn't solve the issue.