Unfinished nLite Operation?

[debiski]

I am new to all of this, so excuse my ignorance. I ran nLite and got as far as creating the .ISO file (looked like it created it), but then must have done something wrong. I had to restart nLite and now I'm getting an error that says "Detected unfinished nLite operation. Don't reuse broken installations. Please copy a clean Windows installation files and redo the process.

I have Windows Media Center OEM on my machine.

What am I doing wrong? I tried to uninstall nLite and start from scratch, but I'm still getting the same error message. I searched for the .ISO file on my computer and can't even find it. WTH?