LoL- Undefined/Unavailable server error- FIX

All you need to do to solve this is to type "thereisnourflevel" while having the lol.launcher "on the top" of all your running programs.

When I had this trouble, it had something to do with Norton 360. Everytime I logged in on the computer, some kind of error occured. But it couldn't be fixed automatically with Norton 360, so all I had to do was to go to the support website, follow the steps, and it was all fine.