A while back I tried to set up a Minecraft server, not using Mojang's application. Sadly, this really screwed over my system and it doesn't allow me to operate the game anymore.
"Launchj4"
"The registry refers to a non-existant Java Runtime Environment installation or the runtime is corrupted.
The system can't find the path specified."
What I DO know is that I had to jump through a bunch of hoops to try and get it to work months back, before it stopped working.
I used Command Prompt to change the Java to run in a folder called "Server". When the server was too terrible and the lag unbearable with just me on it, I deleted it.
The problem is, I DON'T KNOW HOW TO CHANGE IT BACK so that it chooses the ACTUAL JAVA FOLDER instead of the ONE THAT DOESN'T EXIST ANYMORE.
Added (1). No, I just used Command Prompt to make it use Java but from a different location than the default folder it's in automatically. But, my problem is I don't know how to make it do the opposite.
Added (2). Deadpool, I'm not trying to start a server. I'm trying to make JAVA work.