Ok, if you did format your pc, then you was getting error from: 1 - Some files missing or corrupted in the windows register. (regedit) 2 - Some programs making interference with the game, that could be solved in task manager. I've unchecked the box that I mentioned before, but I didn't get the error. Ps.: I saw your video, you ran the updater but then you ran l2.exe. Once you click in launch, the game initializes a bit later, so better wait.