LAUNCHER CRASHES!!

What I expected to happen was...:
that my launcher would work properly

What actually happened was...:
my launcher crashes every time I activate it

(this is what it says: Completely ignored arguments: [--nativeLauncherVersion, 301]
[17:47:46] [Client thread/INFO]: Setting user: LotteWalnoot
[17:47:46] [Client thread/INFO]: (Session ID is <censored>)
[17:47:53] [Client thread/INFO]: LWJGL Version: 2.9.4
Execution protection violation
#

1. A fatal error has been detected by the Java Runtime Environment:
   #
2. EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00000000, pid=6536, tid=7868
   #
3. JRE version: Java(TM) SE Runtime Environment (8.0_25-b18) (build 1.8.0_25-b18)
4. Java VM: Java HotSpot(TM) Client VM (25.25-b02 mixed mode windows-x86 )
5. Problematic frame:
6. C 0x00000000
   #
7. Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
   #
8. An error report file with more information is saved as:
9. C:\Users\Lotte\AppData\Roaming\.minecraft\hs_err_pid6536.log
   #
10. If you would like to submit a bug report, please visit:
11. http://bugreport.sun.com/bugreport/crash.jsp
12. The crash happened outside the Java Virtual Machine in native code.
13. See problematic frame for where to report the bug.
    #
    Java HotSpot(TM) Client VM warning: Using incremental CMS is deprecated and will likely be removed in a future release

please help me? I don't know what to do

//Lotte