Help with installing

[Vat_King]

So I installed it normally but when I run it, it always crashes. I can't copy the report because it is in a window, so I'll type the first line here:

 

An error occurred while launching: SHA1 digest error for net/minecraft/client/MinecraftApplet.class

 

So thats the line I get if I install forge manually. If I use SK's Minecraft Launcher to install it, it gives me this error:

 

An error occurred while launching: cpw.mods.fml.relauncher.ReflectionHelper$UnableToFindClassException: java.lang.ClassNotFoundExeption: net.minecraft.Launcher

 

I'm using Forge 4.1.1.251 If anyone can help that would be great. (even if I made a tiny mistake could you tell me?)

[luacs1998]

Do you know how to delete META-INF?

I mean, it's elementary, my dear Watson.

And SK's launcher is incompatible.