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.
This driver is from the Killer network wireless adapter
*** 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)
Translations: 0000.04b0 0000.04e4 0409.04b0 0409.04e4
Name  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
PNP Device ID PCI\VEN_168C&DEV_003E&SUBSYS_15251A56&REV_20\4&1B6710B3&0&00E3
Last Reset 2015-12-20 9:34 AM
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)