After Turning Off Computer via Power Button, Computer Now Reboots After Shutting Down Via Windows

[TurboCoder2016]

I have owned a custom built machine I built myself for over 2 years now. I just upgraded to Windows 10, and it has been working flawlessly for about month. On Sunday, I have started experiencing a really weird issue. Please keep in mind that I have not performed any updates (my machine is completely up-to-date according to Windows update). The issue is:

On Sunday, I hit the power button on my computer to shut down my machine. Ever since then, I can't shut down in Windows 10 normally (when that's all I used to do to shut down). I would click the windows start logo, click on Power > Shut Down. And, it would shut down just fine. Now, since I hit the power button to shut down, all it will do is shut down and then the computer will reboot automatically after about a minute of being shut down. I have unplugged devices from the machine, plugged them all back in, have ensured I am not running GIGABYTE on/off, have ensured that fast reboot in Windows 10 is disabled, the whole nine yards. The issue is driving me nuts, considering I have not installed a single brand-new thing on my computer (software or hardware) in the weeks & days leading up to this.

I just want it to function like it did before (when I shut down via Windows). I don't want to have to always hit the power button for it to shut down normally. Anyway, here's my setup:

Gigabyte LGA 2011 DDR3 2133 Intel X79 SATA GA-X79 UP4 Motherboard
Intel i7-4820K LGA 2011 64 3.7 GHz CPU
Corsair Vengeance Pro Series DDR3 1866 (PC3 15000) 16 GB RAM
EVGA GeForce GTX760 FTW with ACX Cooler 4GB GDDR5 256Bit SLI Ready Video Card
Antec Twelve Hundred V3 Black Steel ATX Full Tower Gaming Case
Corsair Hydro Series Extreme Performance Liquid CPU Cooler H100i
Western Digital 2TB SATA III 7200 RPM 64 MB Cache HD
EVGA SuperNOVA 1000 P2 80PLUS Platinum Certified ATX 12V Active PFC 1000W Power Supply
Pioneer Electronics USA Internal Blu-Ray Writer
Linksys Wireless-N PCI Adapter with Dual Band (WMP600N)
ASUS MX27AQ 27" WQHD 2560x1440 AH-IPS DisplayPort HDMI Back-lit LED Monitor

 

[CountMike]

Run this line:
%windir%\System32\shutdown.exe -s -f -t 00
And see if it shuts down properly.

 

[TurboCoder2016]

Run this line:
%windir%\System32\shutdown.exe -s -f -t 00
And see if it shuts down properly.

Thank you, Mike. I tried running that line and it still reboots after shutdown. 🙁

 

[CountMike]

Another thing to check would be BIOS and wake up events as well as state after power loss.

 

[TurboCoder2016]

Hi Mike,

I have: checked the BIOS and ensured that all additional booting solutions are disabled, that the only boot device is the main hard drive, etc.

I cannot seem to identify anything in this BIOS that tells me what the state is after power on or power loss, though.

My computer still powers on after shut down.

 

[CountMike]

From the manual:
2-7 Power Management
AC BACK
Determines the state of the system after the return of power from an AC power loss.
?Memory The system returns to its last known awake state upon the return of the AC power.
?Always On The system is turned on upon the return of the AC power.
?Always Off The system stays off upon the return of the AC power. (Default)
& Power On By Keyboard
Allows the system to be turned on by a PS/2 keyboard wake-up event.
Note: To use this function, you need an ATX power supply providing at least 1A on the +5VSB lead.
?Disabled Disables this function. (Default)
?Keyboard 98 Press POWER button on the Windows 98 keyboard to turn on the system.
?Any Key Press any key to turn on the system.
& Resume by Alarm
Determines whether to power on the system at a desired time. (Default: Disabled)
If enabled, set the date and time as following:
?Wake up day: Turn on the system at a specific time on each day or on a specific day in a month.
?Wake up hour/minute/second: Set the time at which the system will be powered on automatically.
Note: When using this function, avoid inadequate shutdown from the operating system or removal of the
AC power, or the settings may not be effective.
& High Precision Event Timer (Note)
Enables or disables High Precision Event Timer (HPET) for Windows 7/Vista operating system. (Default:
Enabled)
2-7 Power Management
(Note) Supported on Windows 7/Vista operating system only.
- 51 - BIOS Setup
& Soft-Off by PWR-BTTN
Configures the way to turn off the computer in MS-DOS mode using the power button.
?Instant-Off Press the power button and then the system will be turned off instantly. (Default)
?Delay 4 Sec. Press and hold the power button for 4 seconds to turn off the system. If the power
button is pressed for less than 4 seconds, the system will enter suspend mode.
& Wake on LAN from S5
Allows the system to be awakened from an ACPI sleep state by a Allows the system to be awakened from
S5 ACPI sleep state by a wake-up signal from the onboard LAN. (Default: Enabled)
& ErP Support
Determines whether to let the system consume least power in S5 (shutdown) state. (Default: Disabled)
Note: When this item is set to Enabled, the following functions will become unavailable: PME event wake
up, power on by mouse, power on by keyboard, and wake on LAN.

 

[TurboCoder2016]

Mike,

Thank you for the information. I have been through all these. They are all disabled/enabled as they should be, so I couldn't find any conflicts or what could be causing this issue. I have included screenshots of the BIOS screens below so you can see as well. If there is something I may have missed or otherwise may not be viewing as a conflict, that is always possible too. Please see below:

http://screencast.com/t/IpJ9p4JPZ

http://screencast.com/t/zB3qtEzgCSr

http://screencast.com/t/9lrFX6gK0824

http://screencast.com/t/kp2dnLMWRr7

http://screencast.com/t/UGgQ326y

http://screencast.com/t/tShOp5med

http://screencast.com/t/gGzcuLVp

http://screencast.com/t/XAoJN06NdhMd

http://screencast.com/t/dn3ADZ7Xyl

http://screencast.com/t/xfdUQxmrXCl

 

[CountMike]

Looks like you set them all right, can't explain the cause of the problem than. Really unusual.