BSOD regarding ntoskrnl.exe

I have been getting BSOD for a few months now. They occur totally randomly, sometimes up to 8 hours after I begin using my computer, sometimes in as little time as five minutes. I have updated all my drivers and run the windows memory check so I believe the problem does not lie there. All the errors have cited "ntoskrnl.exe" as the main cause of issue. Please help me fix my problem. The attached screenshots are the report created for one specific instance of the occurrence.

I am relatively unskilled when it comes to troubleshooting, so please walk me through everything I must do. Thanks a ton!

Fist of all, you have to post it following the Blue Screen of Death (BSOD) Posting Instructions. :)

We need not only the crash dumps but all files generated by the SF diag tool to have closer look at the issue. Do it properly.

Anyway, it is a beta version of NVIDIA Graphics filter driver.

Code:

fffff880`03ca5000 fffff880`03ced000   nvkflt   T (no symbols)           
    Loaded symbol image file: nvkflt.sys
    Image path: \SystemRoot\system32\DRIVERS\nvkflt.sys
    Image name: nvkflt.sys
    Timestamp:        Sat Dec 01 08:54:39 2012 (50B97877)
    CheckSum:         0004E381
    ImageSize:        00048000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

Apply the latest version of nVidia display driver.
You may download it directly, from our forum link Latest NVIDIA ForceWare Video Drivers Windows 7; or you may opt for the Option 2 of Drivers- Download NVIDIA Drivers for “Automatically find drivers for my NVIDIA products” (it requires java installed).


During installation, opt for Custom (Advanced) option. Uncheck all the elements you dont need (I guess the Graphics Driver and the PhysX is enough, if you dont use 3D settings); and check the "perform a clean installation" box.

Intel Graphics driver is kinda old, too.

Code:

fffff880`0561b000 fffff880`0642e660   igdkmd64 T (no symbols)           
    Loaded symbol image file: igdkmd64.sys
    Image path: \SystemRoot\system32\DRIVERS\igdkmd64.sys
    Image name: igdkmd64.sys
    Timestamp:        Tue May 22 00:34:11 2012 (4FBA91AB)
    CheckSum:         00E1DD4B
    ImageSize:        00E13660
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

Update the Intel HD Graphics Driver, either from our forum link, Latest Intel HD Graphics Driver for Windows 7, or You may get it from Intel Download Center.
Moreover, you may run the Intel (R) Driver Update Utility to auto detect the appropriate driver for your computer.

Download and install this version of intel Rapid Storage.

update the network driver.
First, download the network card driver from manufactuer's website.
Then reinstall the driver following this:

1. Click the Start Button, type "devmgmt.msc" (without quotation marks) in the Start Menu Search box and press Enter.
2. Double click to expand "Network adaptors".
3. Right click your network card and click Uninstall.
4. Check "Delete driver software for this device" check box, click OK.
5. Restart the computer
6. If windows does not auto configure the appropriate drivers at startup, install the downloaded one manually.

Lack of info; cannot help you to do the network update specific. That's why we need you follow the instructions properly, to help you better.