Keyboard remains on or never turns on

Since migrating to Windows 10 I've been experiencing power issues with my keyboard (Corsair Vengeance K70).

About 1 in 10 times I switch the computer on or off, the keyboard will either remain on and lit (when computer is switched off), or the keyboard won't turn on (when the computer is switched on).

I presume Windows 10 is responsible because ever since migrating I've noticed on shutdown the hard drives will spin down and the PSU (Superflower Gold) will remain on for a few seconds after. I presume this allows Windows 10 to boot up again so quickly the next time?

Anyone have a similar issue or hopeful solution?

Try disabling fast boot in power options.

Thanks for the tip, hopefully this fixes things.

It also seems to have fixed the issue of Num Lock being turned off each time as it now boots with Num Lock on.