PC starts automatically after a shutdown

[frontrowseat]

I have been working on this issue for a little bit and I am running out of ideas. Yesterday I built a new PC and I've noticed that when I try to shutdown from the OS, the PC will boot back up on its own immediately after it finishes shutting down.

To make sure this wasn't an OS issue, I wiped everything off of my PC and installed a fresh copy of Windows 7 Professional x64. The first thing I did once Windows was installed was shutdown from the OS. The computer restarted as soon as it finished shutting down. I then tried the exact same steps but with Ubuntu instead. Same story.

During both my Windows and Ubuntu steps, I ensured that the BIOS was set to the factory default settings and that the only things plugged into my PC were my keyboard, mouse, monitor, and power cable. I then tried the same steps on Windows but with an updated BIOS. I also disconnected my Western Digital disk drive (see below for specs) and ran everything from the SSD so as to speed up the boot process.

The funny thing is that when I hold the power button on the case, the PC will shutdown and stay shutdown. Ideas?

Hardware:

http://pcpartpicker.com/p/2vTWK8

• 
  - Intel Core i5-4690K 3.5GHz Quad-Core Processor
  - Corsair H80i 77.0 CFM Liquid CPU Cooler
  - Asus Z97M-PLUS Micro ATX LGA1150 Motherboard
  - Patriot Viper 3 Low Profile Blue 8GB (2 x 4GB) DDR3-1600 Memory
  - Kingston SSDNow V300 Series 240GB 2.5" Solid State Drive
  - Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive
  - Asus Radeon R9 280 3GB DirectCU II Video Card
  - Fractal Design Node 804 MicroATX Mid Tower Case
  - Corsair RM 550W 80+ Gold Certified Fully-Modular ATX Power Supply
  - Acer H236HLbid 60Hz 23.0" Monitor

 

[Ironsounds]

Hello... 1) Do you have all the WAKE states, in your BIO's, Disabled/turned off?
2) Are you installing any BIO's updating/LIVE ASUS programs?
3) Have you got a short or miss wiring " polarity " problem at your Power Switch input?

 

[frontrowseat]

Hello... 1) Do you have all the WAKE states, in your BIO's, Disabled/turned off?
2) Are you installing any BIO's updating/LIVE ASUS programs?
3) Have you got a short or miss wiring " polarity " problem at your Power Switch input?

1) I am not sure if my BIOS has any kind of options for that. I looked around and I cannot find anything. Does anybody who might be more familiar with that mobo have any ideas?

2) I have tried this with both the factory standard BIOS settings and with the latest updated version of BIOS.

3) I initially thought that might be the issue but the wiring from my case power button to my mobo looks sound

 

[Ironsounds]

Hello... Did you look at your Manual/PDF that came with your MB? there is a whole BIO's Screen Page relating to WAKE states.
Maybe repost " WAKE States Help Asus Z97M-PLUS "
Also there are Windows Setting too, so between the BIO's and Windows there can be some problems/interaction... they are in Control Panel-Power Options.

 

[frontrowseat]

Hello... Did you look at your Manual/PDF that came with your MB? there is a whole BIO's Screen Page relating to WAKE states.
Maybe repost " WAKE States Help Asus Z97M-PLUS "
Also there are Windows Setting too, so between the BIO's and Windows there can be some problems/interaction... they are in Control Panel-Power Options.

I went through the manual and anything related to WAKE states are disabled

 

[frontrowseat]

Clearing the CMOS fixed my issue.