Hello and welcome to Bleepingcomputer.
First off lets call attention to this part of your log.
A driver has overrun a stack-based buffer. This overrun could potentially
allow a malicious user to gain control of this machine.
A driver overran a stack-based buffer (or local variable) in a way that would
have overwritten the function's return address and jumped back to an arbitrary
address when the function returned. This is the classic "buffer overrun"
hacking attack and the system has been brought down to prevent a malicious user
from gaining complete control of it.
Do a kb to get a stack backtrace -- the last routine on the stack before the
buffer overrun handlers and bugcheck call is the one that overran its local
Arg1: 00b2000000520000, Actual security check cookie from the stack
Arg2: 00b2000000520000, Expected security check cookie
Arg3: 0000000000520000, Complement of the expected security check cookie
Arg4: 0000000000000000, zero
I would have to strongly advise you to download, update and run MalwareBytes to scan your computer for possible malware you may have aquired from a malicious web site.http://www.malwarebytes.org/
Download the FREE version.
Also try this program Spybot search @ destroy http://www.safer-networking.org/en/ownmirrors1/index.html
Good luck and keep us informed.