Hello Ibawolf,
Mini dumps are pointing towards ntfs.sys file & ntkrnlpa.exe i will second to awawada to remove symantec and see if blue screen occurs or not.
I just Googled ntkrnlpa.exe and there are so many cases for BSOD for you too look at:
http://www.google.com.pk/search?q=ntkrnlpa.exe&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-aBest Regards.