As you can see below, there are only three instances in all the provided crash dumps, where the offending driver was named, two of which were the same driver.
I have a feeling that Norton is playing a role in these crashes because some of it's drivers were unloaded in a few of the crashes.
Uninstall Norton, at lest for troubleshooting purposes and turn on Windows Defender, then monitor the system for a while, to see if the crashes stop.
Norton Removal Tool.
https://support.norton.com/sp/en/us/home/current/solutions/kb20080710133834EN_EndUserProfile_en_us
How to Turn Windows Defender On or Off in Windows 8 and 8.1.
http://www.eightforums.com/tutorials/21962-windows-defender-turn-off-windows-8-a.html
If the crashing continues, update or uninstall Hamachi Logmein, then navigate to the link below, to see if there is an update for,
appexDrv.sys, **** AMD Quick Stream Technology - flow processing engine driver.
HP ENVY TouchSmart m6-k022dx Sleekbook.
http://support.hp.com/us-en/drivers/selfservice/HP-ENVY-TouchSmart-m6-k000-Sleekbook/5375391/model/5447423
If all the steps above fail to rectify the issue, please run driver verifier (DV) per the instructions in the link below.
Note: Make sure to read and remember the steps to reset DV in the event of a crash, and post a link to the newly generated crash dump here.
Driver Verifier-- tracking down a mis-behaving driver. Co-Authored by ZigZag3143& JMH3143
http://answers.microsoft.com/en-us/windows/wiki/windows\_other-system/driver-verifier-tracking-down-a-mis-behaving/f5cb4faf-556b-4b6d-95b3-c48669e4c983
Crash details....
BugCheck 9F, {3, ffffe000040531e0, fffff801e7fa27c0, ffffe000059798a0}
Unable to load image \SystemRoot\system32\DRIVERS\Hamdrv.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for Hamdrv.sys
*** ERROR: Module load completed but symbols could not be loaded for Hamdrv.sys
Probably caused by : ntkrnlmp
Followup: MachineOwner
Loaded symbol image file: Hamdrv.sys
Image path: \SystemRoot\system32\DRIVERS\Hamdrv.sys
Image name: Hamdrv.sys
Timestamp: Wed Feb 26 13:57:24 2014 (530E3914)
Hamdrv.sys: http://sysnative.com/drivers/driver.php?id=Hamdrv.sys
****************
Debug session time: Tue Apr 21 18:06:10.770 2015 (UTC - 4:00)
BugCheck 50, {ffffe00000000060, 0, fffff801a7674aeb, 2}
Could not read faulting driver name
Unable to load image \SystemRoot\system32\DRIVERS\appexDrv.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for appexDrv.sys
*** ERROR: Module load completed but symbols could not be loaded for appexDrv.sys
Probably caused by : appexDrv.sys ( appexDrv+10aeb )
Image path: \SystemRoot\system32\DRIVERS\appexDrv.sys
Image name: appexDrv.sys
Timestamp: Tue Jul 29 19:22:07 2014 (53D82C9F)
appexDrv.sys : http://sysnative.com/drivers/driver.php?id=appexDrv.sys
Note: Updating to Windows 8.1 may very well resolve these issues, so you mighty want to keep that in mind.