Jcbertho

I'm using 7. Whenever I try to open up the .jar it goes weird and a bunch of junk pops up like save this file and that, and I saved it all and opened it all up, then nothing happened.

Well all bunch of junk pops up. I'm using 7. What do I use to open up the jar file with?

What do I open the jar with?

Launcher Version: Latest I just barely downloaded Operating System: PC Java Version: Latest I get auto updates Antivirus Program: AVG or AVI Description of Problem: Whenever I try to open up the .exe it says checking launcher version and then closes. I also don't know what to open up the jar. file with! I've tried every thing but then it goes all wacko! Error Messages: exe.: Checking Launcher Version/ jar.: Invalid Command Error Log: