My main computer is an old Dell Dimension 2350 w/P-IV, 1gb RAM. Watt OS 5 runs great on it, not too bloated for it to handle. Only newer Ubuntu variant I've tried on it was Zorin OS6 but the full vers. was a little too much for it. Tried Peppermint 3 also but it seemed kinda buggy. Got a dual core Netbook with Xubuntu 12.04 on it. Tried Watt in live awhile back and kinda forgot about it. Guess I was looking for too much flash from this old box. Very happy with 5 on it though. Thanks Biff!