PC occasionally won't boot with USB devices plugged in.

[[FnG]magnolia]

Hi all,

Looking for some advice on a sporadic yet annoying problem. My PC will sometimes not boot up unless all USB devices (KB/M, headphones etc) are removed. Removing them, booting and plugging them back in works fine but is obviously not ideal.

This happens rarely and seems to have no apparent pattern so I wondered if anyone has advice on where to start?

Windows 10
i5 4690k
Asus Z97 - A
Gskill RipjawX 1866Mhz
Asus Strix 970GTX
600w PSU (can't remember the brand but it was a good one, although it's old now).

 

[[FnG]magnolia]

Sorry, should have been clearer. The PC doesn't attempt to boot up at all until all of the USB devices are removed. Pressing the ON button does nothing. Thanks for the suggestions