Why does my computer wake up on its own?

Question

Iron

Some hell of a thing has been going on for the past few months. I put my computer in sleep mode and it wakes up on its own. At first I noticed that it often wakes up when you turn on the netbook, which is at that time on the table (computer under the table). Then he began to sometimes wake up right after entering sleep mode. I took out a mouse, a keyboard, a Wi-Fi adapter, a network cable from the computer - it still is self-willed.
What can be wrong? What other device can wake up a PC from sleep? Or is it something else? The time to wake up from sleep varies from a few seconds to ten minutes.
Mother Asus P7H55-V. Conf is about four years old, costs Windows 7 SP1 x64.

Answer 1

wake on lan in the bios is there any option to wake up from devices?

Answer 2

I would start by checking the power supply. There was a case when the computer rebooted when the kettle was turned on in a distant outlet. Took the power supply apart and found a leaking capacitor. Replaced the PSU and everything is fine.

Answer 3

look at what is at the expense of awakening in the BIOS and in the Windows settings.

Answer 4

I usually had a cat that liked to lie down on the keyboard.
In general, look at the BIOS settings.

Answer 5

I have the same. turn on for half a minute and turn off. and at 4 am. a virus or a software update check or something else - there is no time to figure it out. mark the solution if found.