BSOD kernel_security_check_failure

So my fairly new PC (built in last July, Windows 8.1 Pro) has started to give me a BSOD. Usually it is KERNEL_SECURITY_CHECK_FAILURE, after I have been playing some games (usually League of Legends) and then maybe watching videos from youtube etc. Or if I leave my computer to idle it almost always crashes. I have no idea what is causing this, it started to happen only about a few weeks ago. This can be avoided by leaving some video or stream open so my computer does not "idle", but it isn't a fix. Before these BSODs I rarely saw a BSOD, maybe once or twice.

Specs of my PC:
Intel Xeon E3-1231 v3, LGA1150, 3.4GHz, 8MB
PNY 240GB Optima SSD
AMD Radeon R9 290 Gaming, 4GB GDDR5, 2xDVI/HDMI/DP
Seagate 1TB Barracuda, 3.5", Sata3, 7200rpm, 64MB
Seasonic 650W G-650, 80 Plus Gold
Kingston 16GB (2x8GB) HyperX Fury, DDR3 1866MHz, CL10, 1.5V
MSI Z97-G43 GAMING, LGA1150, Intel Z97, DDR3, ATX

View attachment 60286

My language on my pc is Finnish so I hope those files are not completely in finnish...

EDIT: Just got another BSOD: DRIVER_IRQL_NOT_LESS_OR_EQUAL (ndis.sys).

Hi Tontsasd & Welcome to the forums ^_^,

I am extremely sorry for the delayed response . There are very few BSOD analysts. Do you still need help with your problem? If yes, then kindly reply back to this topic and I would reply within 48 hours. Also, I would be notified via email once you post.


-Pranav

Tontsasd said:

KERNEL_SECURITY_CHECK_FAILURE, after I have been playing some games (usually League of Legends) and then maybe watching videos from youtube etc.
EDIT: Just got another BSOD: DRIVER_IRQL_NOT_LESS_OR_EQUAL (ndis.sys).

Click to expand...

Windows 8 users with those BSOD codes need to install this Hotfix:
https://support.microsoft.com/en-us/kb/3055343

EDIT: It applies to Windows 8 users despite saying Windows Server 2012