Is your computer waking up in the middle of the night and staying awake, or is it waking up and immediately going back to sleep? By default, a computer switches from sleep to hibernate after 180 minutes of sleep.

Is your computer waking up in the middle of the night and staying awake, or is it waking up and immediately going back to sleep? By default, a computer switches from sleep to hibernate after 180 minutes of sleep.

why bother to turn in sleep mode if you won't turn it off?
this is desktop right?
sure it run with less power consumed, how much less, it depends with the hardware you have in it.
probably not much less if you leave it idle.
btw it's nice to have someone to paid your bill.
and I agree with foxi while everything is off but not with motherboard and PSU.
for your problem, might want to switch mouse & keyboard (also anything connected to USB, like webcam) and see the result.

seems your thread got respond too fast before I was trying to reply (and yes I haven't read all message, in fact I just read title and last message)
