BSOD randomly, Wife's Computer, No error Code

Code:

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*                        Bugcheck Analysis                                    *
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Use !analyze -v to get detailed debugging information.

BugCheck 116, {fffffa8004283010, fffff8800f1f2034, ffffffffc00000b5, a}

Unable to load image \SystemRoot\system32\DRIVERS\nvlddmkm.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for nvlddmkm.sys
*** ERROR: Module load completed but symbols could not be loaded for nvlddmkm.sys
Probably caused by : nvlddmkm.sys ( nvlddmkm+153034 )

Code:

Followup: MachineOwner
2: kd> lmvm nvlddmkm
start             end                 module name
fffff880`0f09f000 fffff880`0fcd6000   nvlddmkm T (no symbols)           
    Loaded symbol image file: nvlddmkm.sys
    Image path: \SystemRoot\system32\DRIVERS\nvlddmkm.sys
    Image name: nvlddmkm.sys
    Timestamp:        Wed Oct 23 16:51:50 2013 (52676AFE)
    CheckSum:         00C0CF0F
    ImageSize:        00C37000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

Code:

Name	NVIDIA GeForce GTX 460

Most of the bugchecks are 124's, meaning its a hardware problem, but you have a few 116's, pointing to a video display/graphics card/driver issue.

Try the following:

1. Open the computer, and clean out any accumulation of dust, especially on the video card and fans.

2. Use this site to automatically detect if an updated driver is available for your video card, install it if one is available:
Drivers | GeForce