Minecraft not launching

I bought minecraft for pc yesterday and im not happy that i haven't been able to play it at all yet,if i do not get help i want my money back.The launcher just pops back up with this message:-

[10:43:53] [Client thread/INFO]: Setting user: SL_Darter
[10:43:53] [Client thread/INFO]: (Session ID is token:8809a758fa774729940b681fcf246261:7b6b470a93d54a9f8a2cb55924440efc)
[10:43:57] [Client thread/INFO]: LWJGL Version: 2.9.4
Execution protection violation
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1. A fatal error has been detected by the Java Runtime Environment:
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2. EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x2a1ee500, pid=6632, tid=7716
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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 0x2a1ee500
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7. Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
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8. An error report file with more information is saved as:
9. C:\Users\richard\AppData\Roaming\.minecraft\hs_err_pid6632.log
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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.
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    Java HotSpot(TM) Client VM warning: Using incremental CMS is deprecated and will likely be removed in a future release