Perhaps you could submit your query to the devs and seek a bit of advice from them? I mean, I'm not really sure what your problem could be. Is your hard drive very free for space? have you any programs running in the background that could impede performance? just some thoughts. Maybe you could scan for viruses and see if that turns up anything.

''And so it was, that the herald of Cthonian war mastery stormed the burning violet fields of Kerrul'thar, enraptured in glorious twilight as he reigned destruction upon the brave Atlantean heroes!''