Minecraft Forums

Both me and my friend cannot open up Minecraft v1.2.5 on the launcher. Here's the crash report:
Edit: it does the same thing for all versions below 1.6.2, which were on the original dirt/stone launcher from back in the day.

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

Minecraft has stopped running because it encountered a problem.

--- BEGIN ERROR REPORT 7cf3a456 --------
Generated 3/21/17 7:43 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: AMD Radeon (TM) R9 380 Series version 4.5.13469 Compatibility Profile Context 21.19.519.2, ATI Technologies Inc.

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 221a9453 ----------

Click your name in the launcher, log out and log back in