Well, I decided to erase the volume and do a clean install. I had only recently moved to OS X (10.2.8), so I didn't have that much stuff on the volume. All went well, I'm here in mail now, sending this. BTW, I had purchased this OS X disk at the Apple store in my town, and it's v 10.4.6. So that is where I'm at. I just hope I don't have problems if/when I reboot. The first time I did the install, though I did it as an upgrade from 10.2.8, everything seemed fine, automatically got the reboot after installation was complete. It wasn't until I rebooted (for some reason) later that I ran into my problems. I don't have any reason to do this now, and I plan on putting it off, for awhile at least. I guess now I'd like to know if anyone has any thoughts on the post 10.4.6 upgrades - are they worth doing? And thanks to all who tried to help me. Last night I went to macfixit and a few other places and scared myself reading the problems some people were having with updates, and the myriad work-arounds, some of which were mentioned here. I must say I have rarely had any problems upgrading my system. X was the one that I worried about, and then 10.2.8 was a breeze and I felt silly to have waited so long. I do agree that doing an upgrade from 10.2 to 10.4 might have been too big a jump, and I just should have done a clean install in the first place. margaret