How old of a computer are we talking? your gunna need to run it with a pretty decent computer if u want as little lag as possible, Back years ago I had a total rust bucket of a computer and when I played lineage 2 it took so long to load up and teleport it was unbearable, also it was such a rubbish computer that it froze my computer in Giran, on the official of course which might have had something to do with it as there was alot of people on but still I would suggest at least 1 Gig of ram and a decent graphix card with windows xp, it's what I have anyway and I can play near enough any game on high detail.