The first time I got the World of Minecraft Client, it worked well, I had to take it off of the computer (it died out) so I did it another time, didnt work (Jar file wasnt found) I got the latest java, and put the Jor file INTO the Lib folder, same problem, did it other times including to day, still same problem. I got the jar file from the Minecraft site and the link in the fourm. So if you have any solutions, please post it, ill gladly enjoy that.