I left it on there for at least an hour at least a couple of times..... I just downloaded it so I don't have ANY shared files..... I had a version that I downloaded about 2 weeks and it worked fine up until yesterday and then it started doing the same thing only froze on the loading user interface phase so I uninstalled it and installed the new one..... and i uninstalled it and reinstalled at least 3 or four times...still no good..... I have a 12 inch ibook...and i think its a 800 mHz G3....help!