I purchased my iMac G4 17" 800mhz 768mb from someone used. I would like to delete their user account as I am tired of seeing my computer being called meme's computer. Also, my hard disk does not show in the finder, just Network and my flash drives. Is this normal? One more thing flash sites are really slooow on this Mac. Is that just because my processor sucks or is there some setting I don't know about.