► First of all, update your Citrix Deterministic Network Enhancer Miniport or Cisco Systems VPN Client from Cisco Systems, Inc
, or from any other source if you know it. It is very old.
Driver Reference Table - dne64x.sys
start end module name
fffff880`05226000 fffff880`05252000 dne64x T (no symbols)
Loaded symbol image file: dne64x.sys
Image path: \SystemRoot\system32\DRIVERS\dne64x.sys
Image name: dne64x.sys
Timestamp: Tue Nov 11 06:31:24 2008 (4918D964)
Translations: 0000.04b0 0000.04e4 0409.04b0 0409.04e4
► A lot of your dumps indicate to DirectX Graphics MMS (dxgmms1.sys). The installed one is of Nov, 2010. Try for upgrade, if possible.
► The rest of the dumps points to Nvidia display driver (nvlddmkm.sys), updated around that time you reported your system started crashing. I would suggest you to remove all components of nvidia driver using |MG| Driver Fusion (Driver Sweeper) 1.2.0 Download
in safe mode, and then install an earlier version of the driver that worked perfectly.
Let us know the results.