I just downloaded minecraft cause i deleted it because it was very laggy, but now I have version 1.6.5 of the launcher, and everytime I try to open the game (no matter what version) the game instantly closes, doesn't even show the Mojang logo, and the launcher shows this error:

[20:32:36] [Client thread/INFO]: Setting user: legolee913
[20:32:37] [Client thread/INFO]: (Session ID is token:127f2c80663941b5bbe45a1011e85817:344bf46eb704436f9223dcb48ff466ea)
[20:32:38] [Client thread/INFO]: LWJGL Version: 2.9.1
[20:32:38] [Client thread/INFO]: Reloading ResourceManager: Default
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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=0x000000001ad2ae8d, pid=11244, tid=1292
   #
3. JRE version: Java(TM) SE Runtime Environment (8.0_25-b18) (build 1.8.0_25-b18)
4. Java VM: Java HotSpot(TM) 64-Bit Server VM (25.25-b02 mixed mode windows-amd64 compressed oops)
5. Problematic frame:
6. C [ig7icd64.dll+0x4aae8d]
   #
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\Paula\AppData\Roaming\.minecraft\hs_err_pid11244.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.
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    Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release

I'm using a windows 8 laptop

PLEASE HELP AS SOON AS POSSIBLE!!