NMI Hardware Failure in Windows 8

3On Windows 8, NMI (Non-Maskable Interrupt) can be generated by the user manually by pressing the NMI switch present on your computer or just because of hardware error.  When you found this error on your computer your window stops executing and displays blue screen error or BSoD that states: “Your PC ran into some problem need to be restated”, and includes the below error code: NMI_HARDWARE_FAILURE.

Your computer will save the memory dump file, and will automatically reboot which depend on the setting particularly under “Startup and Recovery” in the “Advanced system settings” under System control panel of your computer. The behavior of NMI has changed as compared to the earlier version of Windows. In Windows 7 or in Windows server 2008 R2 and its earlier version the response when a computer encounter NMI was depend on the configuration of “NMICrashDump” registry value.

If you are not able to boot your system in normal mode then try the below steps to boot your windows 8 installation disc:

  1. Simple insert the installation DVD or USB and boot your Windows 8 from there.
  2. In “Windows setup” page choose the language to install”. Time and currency format” and the keyboard or input method” and just click on next”.
  3. Click on Repair Your computer” and then choose Troubleshoot”.
  4. Now click on the Advanced options” and choose Automatic Repair” and choose the operating system.

You can also perform the disk check booting from your disc.

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  1. Simple insert the installation DVD or USB and boot your Windows 8.
  2. In “Windows setup” page choose the “language /*to install”. ‘Time and currency format’ and the ‘keyboard or input method’ and just click on ‘next’.
  3. Click on “Repair Your computer” and then choose “Troubleshoot”.
  4. Now click on the “Advanced options” and click on command prompt.
  5. Type the following command from command prompt and hit enter button. chkdsk /f /r X:( drive letter)
  6. Press Y when you prompt to check the disk next time and your system will restart.
  7. Restart your computer.

Note: While performing the check disk on hard drive if any bad sector is found while the chkdsk tries to repair it then any available data can be lost.

But in Windows 8 and Windows server 2012 NMI is not depend on configuration. NMI results in bugcheck 0x80 (NMI_HARDWARE_FAILURE).

What is NMI? How it is generated?

It is very easy to answer as it shed much light of defining NMI. The NMI (“Non Maskable Interrupt”) is a hardware failure. It is a hardware-driven disrupts that is similar to PIC interrupts, but NMI error goes directly to CPU or to any other controller that is the ISP.  Any device can pull NMI line and will generate Non-Maskable interruption. The device that generates NMI is the memory controller that rises when parity error is found. The parity error is when your memory card acts like a flakey.

It shows an unexpected “Hardware Malfunction” error.

It is possible that your device is generating NMI by mistake. In many cases it is generate due to overheating or due to damage.

The NMI occurs due to RAM error or due to unrecoverable hardware issues. For new operating system it can be handled by the help of machine check exceptions or SMI. There are two reasons for NMI. The first reason is due to Hardware Failure error. While the second reason is “watchdog timer“, that is used to find when kernel locks itself.  After getting this error your system gets crashed.

The hardware failure is cause NMI then you will find no other way to figure out the piece of hardware that cause the NMI. If you get NMI due to watchdog timer, then it must be due the OS setup. Its I done when the chipset doesn’t have its watchdog timer example setting the IRQ, PIT, RTC/CMOS or HPET IRQ to “NMI, sends to CPU in I/O APIC. In such situation you need the watchdog timer to be very fast i.e. no slow cache flushing or hardware task switching and you want all CPU’s to give same timer that means you want all CPU’s to receive same IRQ at the same time.

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