Windows 8.1 restarts almost immediately after shut down

[Guest]

Windows 8.1 restarts almost immediately after shut down. It happens around 70 percent of the time. I have to shut it down again. Sometimes it shuts down correctly.

Operating System: Windows 8.1 Pro 64-Bit

Hardware Specs:
Motherboard : Intel DH67BL
CPU : Core i5-2320 3.0GHz
GPU : Nvidia GeForce GTX 760 MSI TwinFrozr Gaming OC Edition 2GB
RAM : Transcend JM1333KLN-4G 16 GB DDR3 1333MHz (4 x 4GB)
SSD : Corsair Neutron GTX 120GB (Windows installed)
HDD : Seagate ST1000DM003 1TB
PSU : Seasonic S12II-620 80 Bronze 620W
Optical drive: LG HL-DT-ST DVDRAM GH24NS71

Other hardware:
Anker USB 3.0 2-Port PCI-E Express Card
TP-LINK TL-WN822N 300 Mbps High Gain Wireless N USB Adapter
Bluetooth USB dongle

What I have tried so far:
1. Turned off fast startup
2. Unchecked the "Allow this device to wake the computer" option in device manager for all devices.
3. I checked the bios settings to make sure that any option that wakes up the PC at any event is disabled.

 

[Reyaz123]

There are people that had this problem and it was caused by a virus.

Try running a full virus scan in "safe mode with networking" to rule out the possibility of a virus causing the reboots.

 

[Guest]

There are people that had this problem and it was caused by a virus.

Try running a full virus scan in "safe mode with networking" to rule out the possibility of a virus causing the reboots.

Thank you for your response. I ran a full scan in "safe mode with networking" & found no virus. But I found out that I could shut down normally in safe mode. I tried powering on and shutting down the PC in safe mode for 5 times & it worked normally every time. So I'm happy to know that it's not a hardware problem. It must be some driver or software that's the cause of the problem. I have had this problem before & every time I reinstalled windows the problem would reappear after a few days. After reinstalling windows I usually wouldn't install all software in a single day. I install them on an as needed basis. So I'm not sure which program is causing my PC to reboot instead of shutting down. I guess I'll have to uninstall some software one by one to check if the problem goes away. If I can't solve the problem this way, I guess I'll have to reinstall windows, disable windows update & install programs one by one & check if the problem appears.
Any suggestions are welcome.

 

[Guest]

I found the cause of the problem.

The problem was caused by the driver for Anker USB 3.0 2-Port PCI-E Express Card. It had always given me problems. The older versions of this driver had problems with detecting devices on the usb port. The driver version 4.70C (VIA_XHCI_Driver_V4.70C_AP) causes the system to reboot instead of shutting down. If I remember correctly, the driver version before version 4.70C had this problem as well but I wasn't aware of that at that time. I used to think that the problem was caused by windows updates. So I reinstalled windows. Anker has released a newer version of the driver "VIA_XHCI_Driver_V4.90A_AP" and this seems to have fixed the shutdown problem. I tried powering on and shutting down my PC 5 times and it shuts down normally.

Here is the solution in case someone else has the same problem.

Uninstall "VIA platform device manager" from control panel, reboot and then go to device manager, click on "Universal Serial Bus Controllers" and uninstall "VIA USB eXtensible Host Controller" and "Renesas USB 3.0 eXtensible Host Controller - 0096 (Microsoft)". Reboot and install the latest version of the driver after downloading it from here: http://www.ianker.com/support/68UPPCIE-2S20PU
The current version of the driver is 4.90A.

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