ntoskrnl error 0x000000d5 DRIVER_PAGE_FAULT_IN_FREED_SPECIAL_POOL

The BSODs are caused by DNE LightWeight Filter (c:\windows\system32\drivers\dnelwf64.sys).

Code:

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Use !analyze -v to get detailed debugging information.

BugCheck D5, {fffff9801621ef20, 1, fffff880042d34fc, 0}

*** WARNING: Unable to verify timestamp for dnelwf64.sys
*** ERROR: Module load completed but symbols could not be loaded for dnelwf64.sys

Could not read faulting driver name
Probably caused by : dnelwf64.sys ( dnelwf64+44fc )

Followup: MachineOwner
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And the driver is old enough.

Code:

fffff880`042cf000 fffff880`042f4000   dnelwf64 T (no symbols)           
    Loaded symbol image file: dnelwf64.sys
    Image path: \SystemRoot\system32\DRIVERS\dnelwf64.sys
    Image name: dnelwf64.sys
    Timestamp:        Thu Jul 28 12:06:44 2011 (4E31037C)
    CheckSum:         00027709
    ImageSize:        00025000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

DNE is usually used by VPN clients. So I would suggest you to update your VPNs. Specially the SonicWALL one.

Let us know the results.