MINECRAFT NOT LOADING AND ALWAYS CRASHING

Minecraft Launcher closes and opens Minecraft when suddenly Displays image saying;
Minecraft has crashed!
----------------------

Minecraft has stopped running because it encountered a problem.
— BEGIN ERROR REPORT 7cf3a456 --------
Generated 6/12/16 6:46 PM

Minecraft: Minecraft 1.2.5
OS: Windows 10 (amd64) version 10.0
Java: 1.8.0_25, Oracle Corporation
VM: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
LWJGL: 2.9.0
OpenGL: Intel(R) HD Graphics 4600 version 4.3.0 - Build 20.19.15.4474, Intel

java.lang.NullPointerException
at java.io.Reader.<init>(Reader.java:78)
at java.io.InputStreamReader.<init>(InputStreamReader.java:97)
at adn.a(SourceFile:62)
at adn.a(SourceFile:99)
at net.minecraft.client.Minecraft.a(SourceFile:262)
at net.minecraft.client.Minecraft.run(SourceFile:657)
at java.lang.Thread.run(Thread.java:745)
— END ERROR REPORT e915edc4 ----------