Minecraft crashes on start

Hey guys. My friend can't get on Minecraft, and he gave me his crash report and told me how he tried to fix it. I decided to post this for him because I wasn't able to fix the problem, and he didn't know where to get help. So basically his game crashes on start up, it says it is most likely not modded, and he tried reinstalling Minecraft, the launcher, Java, etc. Still hasn't done much. So here's his error:

[20:12] [Client thread/INFO]: Setting user: xXNikolXx
[20:12] [Client thread/INFO]: (Session ID is token:cd5160c6c5624be3bc39f65d0e7069fc:43511c013243472787c288dc856147a0)
[20:12] [Client thread/INFO]: LWJGL Version: 2.9.4
[20:12] [Client thread/INFO]: Reloading ResourceManager: Default
#
# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x0000000000000000, pid=7940, tid=13300
#
# JRE version: Java(TM) SE Runtime Environment (8.0_25-b18) (build 1.8.0_25-b18)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.25-b02 mixed mode windows-amd64 compressed oops)
# Problematic frame:
# C 0x0000000000000000
#
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# An error report file with more information is saved as:
# C:\Users\<HISNAMEHERE>\AppData\Roaming\.minecraft\hs_err_pid7940.log
#
# If you would like to submit a bug report, please visit:
# http://bugreport.sun.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release