Whenever I try to launch an older version of Minecraft before 1.6.4, the game literally just crashes before it even gets to the title screen. The oldest version I can run is Minecraft 1.6.4. All older one crash immediately upon launch and all the crash reports look the same.

Minecraft has crashed!
----------------------

Minecraft has stopped running because it encountered a problem.

— BEGIN ERROR REPORT 7cf3a456 --------
Generated 12/8/16 10:47 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: GeForce GTX 960M/PCIe/SSE2 version 4.5.0 NVIDIA 375.95, NVIDIA Corporation

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 d2a165b7 ----------