When you run updater you should see this:
Option before checking files is this:
I was updating my game 4 days ago, so it has to work. The only other option is to install game, unpack into game location files from system_patch from rpg downloading page (remember each server has different system patch and update) and run from system\l2.exe without updating. But you are risking getting critical errors from time to time.
System patch links (official from page, i copy them to make sure you're not taking gf files):
