Kernel security check failure

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There are logs for the past 2 days, so I can't do much for now.
If you clean your system regularly, it is suggested to not do it again while troubleshooting as it may make troubleshooting more difficult due to missing relevant data that could help creating a patern what helps with finding the cause(s)/solution(s)

Please tell me, how have you updated the drivers?
What memtest did you run?

In the 2 dumps only the Killer network driver has been flagged
You can update this driver via your manufacturer Dell.

Code:

*** WARNING: Unable to verify timestamp for Qcamain10x64.sys
*** ERROR: Module load completed but symbols could not be loaded for Qcamain10x64.sys
2: kd> lmvm Qcamain10x64start             end                 module name
fffff800`dfbd0000 fffff800`dfe17000   Qcamain10x64 T (no symbols)           
    Loaded symbol image file: Qcamain10x64.sys
    Image path: Qcamain10x64.sys
    Image name: Qcamain10x64.sys
    Timestamp:        Mon May 18 22:18:19 2015 (555A490B)
    CheckSum:         0022A3A8
    ImageSize:        00247000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

This driver is from the Killer network wireless adapter

Code:

Name	[00000001] Killer Wireless-n/a/ac 1525 Wireless Network Adapter
Adapter Type	Ethernet 802.3
Product Type	Killer Wireless-n/a/ac 1525 Wireless Network Adapter
Installed	Yes
PNP Device ID	PCI\VEN_168C&DEV_003E&SUBSYS_15251A56&REV_20\4&1B6710B3&0&00E3
Last Reset	2015-12-20 9:34 AM
Index	1
Service Name	Qcamain10x64
IP Address	192.168.2.49, fe80::e8a6:ccb4:6b67:a2b9
IP Subnet	255.255.255.0, 64
Default IP Gateway	192.168.2.1
DHCP Enabled	Yes
DHCP Server	192.168.2.1
DHCP Lease Expires	2015-12-23 9:35 AM
DHCP Lease Obtained	2015-12-20 9:35 AM
MAC Address	‪2C:33:7A:05:ED:E1‬
Memory Address	0xF6800000-0xF69FFFFF
IRQ Channel	IRQ 4294967288
Driver	c:\windows\system32\drivers\qcamain10x64.sys (0.0.1.22, 2.15 MB (2,257,816 bytes), 2015-05-21 4:08 AM)

Programs that 'read' dumps aren't enough, they only read the 'probably caused by' part what mostly isn't true.

Ntoskrnl.exe is a Windows file used in the boot process, not much chance it is causing the crash unless the system is having some heavy problems. Windows files are only blamed when they are the last active, but the root cause is usually happened earlier.