Removing Obsolete Repositories
A short while back, I was asking about using live wallpapers in LinuxMint 17. I got a reply which told me how to do it in Ubuntu, which base code is the same. I tried it. It didn't work... because apparently two of the repositories no longer exist.
So now, I'm getting failures on Update. Because the repositories do not exists, and I have no clue how to tell my system to stop checking for them.
I would attach a screenshot but am apparently not getting the skill level I need to either capture or attach it...