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Unxpecteed Kernel Mode Trap Nvlddmkm.sys

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Nvlddmkm.sys error

WALTER KUHL asked on February 14, 2013. Status: Answered & Closed.

Unxpecteed Kernel Mode Trap Nvlddmkm.sys

» Hi, using win 8 randomly my PC restart with blue screen. The error in memory.dmp is releated with nvlddmkm.sys.UNEXPECTED_KERNEL_MODE_TRAP (7f)

Best Answer

» UNEXPECTED_KERNEL_MODE_TRAP (7f) This means a trap occurred in kernel mode, and it's a trap of a kind that the kernel isn't allowed to have/catch (bound trap) or that is always instant death (double fault). The first number in the bugcheck params is the number of the trap (8 = double fault, etc) Consult an Intel x86 family manual to learn more about what these traps are. Here is a *portion* of those codes:

If kv shows a taskGate

use .tss on the part before the colon, then kv.

Else if kv shows a trapframe

use .trap on that value


.trap on the appropriate frame will show where the trap was taken

(on x86, this will be the ebp that goes with the procedure KiTrap)


kb will then show the corrected stack.


Arg1: 0000000000000008, EXCEPTION_DOUBLE_FAULT;

Arg2: fffff88002cd8db0;

Arg3: fffff88002cf5000;

Arg4: fffff880040ba752

Nvlddmkm.sys file can become a big problem if it is damaged or corrupted, because of 1) improper software uninstall or install; 2) incompatible file versions; 3) Windows not updated with the last version; 4) improper deletion of this program; 5) a PC infection; 6) invalid Windows registry files; 7) corrupted Windows registry entries, resulting in Nvlddmkm.sys file not found, system crashing or blue screen of death (BSOD).

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MELINDA HAWKINS replied on February 16, 2013

All Answers:

  1. JUSTIN TAYLOR replied on February 14, 2013: » Please follow the following troubleshooting steps and check if that helps: Try removing any external devices connected to the computer and check if you can boot to the computer.

    You can try running an Automatic Repair from the OS disc: Boot into the Windows 8 Release disc.

    Once selecting your language, time and keyboard settings, click Next to load the next window, then click on the Repair your computer link on the bottom left corner of the window.

    You should then be presented with a Choose an Option screen, with Troubleshoot as an option to select. In the Troubleshoot screen, select Advanced options.

    Select Automatic Repair from the Advanced options screen and then select the target operating system to repair, which would be Windows 8 in this case.

  2. MATTHEW DAVIS replied on February 14, 2013: » Also, It may help to look at the minidump files from the crashes with a debugger.

    Can you zip up the minidump files in the C:\Windows\Minidump folder and make available (provide link) via Windows Live SkyDrive or similar site? The following link has information on using Windows Live SkyDrive:

    If you have problems zipping the minidump files copy the minidump files to another location such as a folder on the Desktop

    Also, you do not necessarily have to zip up the minidump files, you can upload them one at a time.

  3. HENRY HICKEY replied on February 15, 2013: » The problem is 'caused by the last driver the nvida has been released. Turning back no blue screen but the driver dies...

    I try, with the support of Nvidia members to applie un other driver, but all have the same problem: using the GPU the Driver crashes

  4. MATTHEW DAVIS replied on February 16, 2013: » That does appear to be an issue with the nvlddmkm.sys.

    One thing you could try, if you have not already, and it may not help, is to "custom install" the latest NVIDIA drivers and choose "Perform a clean installation".

  5. MARY STONE replied on February 17, 2013: » you could attempt a System Restore, but that will be dependent on whether or not there is a restore point saved on your PC prior to the set of updates you installed. You can find the System Restore option in the Advanced options screen described above.

    You may also try doing the Refresh your PC option if that does not work. You can locate the Refresh your PC option in the same manner you did with finding Automatic Repair, only follow the above steps to number 3, as you will find it listed in the Troubleshoot screen.

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