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I have checked the 3 most recent crashes, they look pretty much like each other.
Everytime the NETIO.sys file was marked which is the Network Input/Output System.
This usually points to the network drivers, but looking a little deeper the Nvidia Video driver is flagged.
Please uninstall everything of Nvidia using Display Driver Uninstaller and install new drivers from your manufacturer.
Please be careful with removing the right drivers as you have switchable GPU's.
*** WARNING: Unable to verify timestamp for nvlddmkm.sys
*** ERROR: Module load completed but symbols could not be loaded for nvlddmkm.sys
0: kd> lmvm nvlddmkm
start end module name
fffff800`da41b000 fffff800`db0b4000 nvlddmkm T (no symbols)
Loaded symbol image file: nvlddmkm.sys
Image path: \SystemRoot\system32\DRIVERS\nvlddmkm.sys
Image name: nvlddmkm.sys
Timestamp: Wed Feb 04 01:08:12 2015 (54D162EC)
Translations: 0000.04b0 0000.04e4 0409.04b0 0409.04e4